It is not easy to find out the truth in Nigeria.
The Baga killings last week are a case in point, with politicians and government officials offering vastly different information – from 150 dead to 2,000.
News of another attack by Islamist militants from Boko Haram often starts as a vague one-liner as was the case on 3 January: “Attack on Baga. Loud gunfire heard.”
This first bit of information often comes via social media. The challenge now is to find out the details and there are plenty of obstacles in the way of getting to the truth.
First up there has been no mobile phone connection in Baga for many months after the jihadists attacked mobile phone masts in the north-east.
There are of course the officials whose job it is to tell the world what is going on.
But for the first few days of the Baga crisis both the military spokesmen and government officials were silent or not picking up calls. Then, often with help from colleagues from the BBC’s Hausa service, the goal is to get through to people who have witnessed the violence.
On 4 January we spoke to a man who had walked for two days through the bush, eventually getting a lift to the relative safety of the biggest city in the area, Maiduguri, on a lorry.
“There was shooting from every corner of the headquarters of the multinational task force,” he tells me, adding that the exchange of fire lasted hours.
Then there are more testimonies from witnesses who say the military base was overpowered and then the gunmen started killing civilians in Baga town.
But every witness we speak to is fleeing for their life. They are not hanging around Baga to check exactly what’s happening so it is hard to be sure we are getting facts.
Then a local politician from the area weighs in with more accounts of people being shot in Baga and others dying as they fled, their boats capsizing on Lake Chad.
“I don’t know how many people have been killed,” says Senator Maina Maaji Lawan, who represents Borno North.
“But at least 70% of the area I represent is in Boko Haram hands.”
Four days after the attack and there is still silence from the government and the military.
Then some journalists manage to meet the chief of defence staff, Air Chief Marshal Alex Badeh. It is not an organised news conference but a hurried exchange in a car park.
He is asked about the attack on the military base in Baga.
Boko Haram at a glance
Founded in 2002
Initially focused on opposing Western education – Boko Haram means “Western education is forbidden” in the Hausa language
Launched military operations in 2009 to create Islamic state
Thousands killed, mostly in north-eastern Nigeria – also attacked police and UN headquarters in capital, Abuja
Some three million people affected
Declared terrorist group by US in 2013
“Of course there was an attack,” he shoots back.
“But don’t worry we are at work.”
Can we retake Baga? Mr Badeh is asked.
“Why not?” is the short reply. Seconds later he ducks into his car and is driven off.
It is an unusual way for the capture of Baga to be confirmed officially although it is worth noting this is the same very senior military official who told us a few months ago that a ceasefire deal had been reached with Boko Haram which turned out to be totally untrue.
More eyewitnesses fleeing Baga are telling the BBC about hundreds of bodies on the streets of Baga.
Another local politician says 2,000 are dead. But he is not there to count them – nobody is because it is far too dangerous – so it is hard to believe him.
Meanwhile in Paris news breaks of, initially at least, 12 people being shot dead by gunmen. Within minutes President Francois Hollande is speaking to the world’s media offering some clarity and leadership.
“This is an act of exceptional barbarism,” he begins and says security measures are in place to apprehend the perpetrators.
Ten days since Baga was first attacked and there have also been several suicide bombings.
But we have not heard a word from Nigerian President Goodluck Jonathan – except for a statement condemning the Paris attacks.
The finance minister also appears keener to comment on events far away that have killed far less people.
“Terrible incident. Our deepest sympathies to the journalists and their families. We are one with France in mourning,” tweets Ngozi Okonjo-Iweala with the hash tag #JeSuisCharlie.
Meanwhile local TV stations follow every twist and turn of the presidential election campaign – some are lengthy programmes sponsored by rival political parties.
The media seem far more focused on the Valentine’s Day vote. That seems to be where the politicians are focused too.
On Monday evening the government put out a statement saying “the number of people who lost their lives during the Baga attack has so far not exceeded about 150”.
But we may never know how many have died in and around Baga. We know there will never be an investigation that will reveal the truth.
It won’t be the first time we are not sure if 150, 300, 500 or even 2,000 people were killed in a massacre in Nigeria.
It could be stated that Nigeria’s militant Islamist group Boko Haram – which has caused havoc in Africa’s most populous country through a wave of bombings, assassinations and now abductions – is fighting to overthrow the government and create an Islamic state.
Its followers are said to be influenced by the Koranic phrase which says: “Anyone who is not governed by what Allah has revealed is among the transgressors”.
Boko Haram promotes a version of Islam which makes it “haram”, or forbidden, for Muslims to take part in any political or social activity associated with Western society.
This includes voting in elections, wearing shirts and trousers or receiving a secular education.
Boko Haram regards the Nigerian state as being run by non-believers, even when the country had a Muslim president.
The group’s official name is Jama’atu Ahlis Sunna Lidda’awati wal-Jihad, which in Arabic means “People Committed to the Propagation of the Prophet’s Teachings and Jihad”.
But residents in the north-eastern city of Maiduguri, where the group had its headquarters, dubbed it Boko Haram.
Loosely translated from the region’s Hausa language, this means “Western education is forbidden”.
Boko originally meant fake but came to signify Western education, while haram means forbidden.
Since the Sokoto caliphate, which ruled parts of what is now northern Nigeria, Niger and southern Cameroon, fell under British control in 1903, there has been resistance among some of the area’s Muslims to Western education.
They still refuse to send their children to government-run “Western schools”, a problem compounded by the ruling elite which does not see education as a priority.
Against this background, the charismatic Muslim cleric, Mohammed Yusuf, formed Boko Haram in Maiduguri in 2002. He set up a religious complex, which included a mosque and an Islamic school.
Many poor Muslim families from across Nigeria, as well as neighbouring countries, enrolled their children at the school.
But Boko Haram was not only interested in education. Its political goal was to create an Islamic state, and the school became a recruiting ground for jihadis.
In 2009, Boko Haram carried out a spate of attacks on police stations and other government buildings in Maiduguri.
This led to shoot-outs on Maiduguri’s streets. Hundreds of Boko Haram supporters were killed and thousands of residents fled the city.
Nigeria’s security forces eventually seized the group’s headquarters, capturing its fighters and killing Mr Yusuf. His body was shown on state television and the security forces declared Boko Haram finished.
But its fighters regrouped under a new leader, Abubakar Shekau, and have stepped up their insurgency.
In 2010, the US designated it a terrorist organisation, amid fears that it had developed links with other militant groups, such as al-Qaeda in the Islamic Maghreb, to wage a global jihad.
Boko Haram’s trademark was originally the use of gunmen on motorbikes, killing police, politicians and anyone who criticises it, including clerics from other Muslim traditions and Christian preachers.
The group has also staged more audacious attacks in northern and central Nigeria, including bombing churches, bus ranks, bars, military barracks and even the police and UN headquarters in the capital, Abuja.
Amid growing concern about the escalating violence, President Goodluck Jonathan declared a state of emergency in May 2013 in the three northern states where Boko Haram is the strongest – Borno, Yobe and Adamawa.
It draws its fighters mainly from the Kanuri ethnic group, which is the largest in the three states. Most Kanuris have distinctive facial scars and when added to their heavy Hausa accents, they are easily identifiable to others Nigerians.
As a result, the militants operate mainly in the north-east, where the terrain is also familiar to them.