Fifteen people were aboard the Italian CH-47 helicopter of Eufor, the European Union peace force in Bosnia and Herzegovina, which crashed Thursday in Brcko, in the country's northeast, during a routine operation, according to Le Monde.

Three died at the crash site; twelve injured were taken to Brcko's hospital, and a fourth person died of injuries after being admitted. Eufor said no civilians were hurt and the accident caused no material damage.