At least four people have died after an airplane with recreational skydivers-in-training aboard crashed at an air field in the Siberian region of Kemerovo.
There were conflicting reports of how many people were aboard the L-410 aircraft on June 19.
But later, officials were quoted as saying that four people had died and 15 more were injured.
A local branch of the federal investigators' office said it was looking into the causes of the accident, which occurred near Tanay airfield at around 10 a.m. local time.
It said the plane was returning to the airfield after one of the pilots radioed that one of the aircraft's engines had failed, and that it apparently clipped a tree with its wing and crashed.