One of alleged victims is a five-year-old girl whose father found a camera with images of her being sexually abused.
France has suspended two of its soldiers over allegations that they sexually abused children in Burkina Faso, and asked authorities there to "quickly return" the military suspects, according to the French government.
"Two French soldiers on mission in Burkina Faso were suspected... of engaging in acts of a sexual nature with two children," France's defence ministry said in a statement on Tuesday.
The suspensions follow an alleged sex abuse scandal involving French troops in Central African Republic (CAR), which caused outrage and only came to light after claims were leaked to the British press.
One of the alleged victims in Burkina Faso was a five-year-old girl whose father found a camera containing images of his daughter being sexually abused.
"There was a soldier who filmed the scene with a camera while the second touched" the girl, a senior police officer in Burkina Faso told the AFP news agency, adding that the parents were friends with the alleged perpetrators.
After discovering the camera at the scene, the father went to the French embassy in Ouagadougou, which in turn alerted the police, who have opened an inquiry, the source said.
Probe opened in France
Paris prosecutors opened their own investigation on Tuesday evening, a judicial source told AFP, while the defence ministry said the military was also looking into the allegations.
Chief of Defence Staff General Pierre de Villiers is leading the army's investigation, and "if the facts are proved, the army will show itself implacable against the two people involved," the ministry said.
"We have contacted the Burkina judicial authorities so that the repatriation is done quickly and justice can act," said government spokesman Stephane Le Foll.
There are about 220 French soldiers stationed in Burkina Faso as part of a French anti-terrorism operation covering five regional countries spanning from Mali to Chad.
There are about 900 French soldiers in CAR, where the initial quota of 2,000 was gradually reduced to make way for a UN peacekeeping mission.
A group of children in CAR alleged troops sexually abused minors at a centre for displaced people in the capital Bangui between December 2013 and June 2014, and 14 French soldiers are under investigation.
Some of the abuse reportedly took place after the children in the conflict-ridden country begged the peacekeepers for food.
