VLADIVOSTOK, June 27 (RIA Novosti) - Two students celebrating their high school graduation died early on Saturday morning in Russia's Far East when they were struck by lightning, local police said.

One boy and one girl were killed in the lightning strike in the village of Zarubino in the Primorye Territory's Khasansky region, while another girl and a policeman suffered burns and were taken to a local hospital.

"The tragedy occurred on Saturday at 5 a.m. Vladivostok time [19:00 GMT on Friday]. After a graduation ball 15 students went to the beach to watch the sun rise. They were accompanied by a police officer, who was keeping order," a Primorye police source told RIA Novosti.

"A loud rumble of thunder was heard, and lightning flashed. Two students - a boy and a girl - died at the scene. Another girl and the police officer were hospitalized with burns," he added.

The source said the lightning struck as the group passed near overhead electric power lines.

He added that several other graduation balls in area passed without incident, and all had police officers present to ensure order.