The French President Emmanuel Macron has denounced the killing of eight people in a wildlife park in Niger.
The victims included six French aid workers.
Mr Macron termed it as a 'cowardly" attack, according to the AFP agency.
The incident took place in an area renowned as the home of the last herds of giraffes in West Africa.
Correspondents say the attack is likely to have been carried out by jihadists who have become increasingly active in Niger moving across the borders from Mali, Burkina Faso and Nigeria.
Ten aid workers were kidnapped in June.