At least seven army personnel were killed in a helicopter crash in Mexican northern state of Durango, official said.
One soldier was found seriously wounded at the scene. The bodies of the rest of the victims were believed to be in the wreckage of the craft, they said.
Mexico defence department said Friday the Bell 412 transport helicopter was on a training mission and was carrying 2 pilots, an officer and five soldiers.
The crash occurred near El Salto in a mountainous region of Durango.
The cause of the crash is under investigation, according to AP.