Two people were killed and two others were injured in a helicopter crash while rescue workers were trying save 10 people whose SUV had become stranded in a river in the northwestern Mexican state of Sinaloa.

An emergency management official in that state told Efe that a group of people traveling in an SUV had tried to cross the San Lorenzo River in the community of Quila but the vehicle became stuck.

The helicopter arrived at the scene Thursday and had plucked one woman from the SUV, but the chopper subsequently crashed into the river, apparently due to excess weight, the official said.

One rescue worker and the woman who had been rescued minutes earlier were killed in the accident, while the pilot and the co-pilot of the helicopter were injured, the official said.

The other occupants of the SUV were brought to safety by another group of rescue workers who had arrived at the scene by land.