One bomber was dressed as a cameraman, police said.
In an official statement released in Arabic and French on Saturday, the militant group said France would remain a top target as long as the country continues its current policies.
This weekend, Jeremy Corbyn won the most constituency Labour party nominations, and an actual scientific study found that "cool" kids often grow up to be losers.
The first attack was aimed at NATO convoy, while a later bombing took place at the Afghan Intelligence regional office. The Taliban has claimed responsibility for both.
There was no immediate claim of responsibility for the attack in N'Djamena but suspicion fell on Islamic militant group Boko Haram. At least 23 people were killed in the two explosions.
The attacks came hours after the Iraqi government announced the beginning of an operation against the militant group in Anbar province.
Al-Shabaab stormed a Kenyan shopping mall this weekend.
People are already dying over Niger's uranium mines.