Russian man blew himself up with a hand grenade Tuesday shortly after train inspectors asked to see his ticket.

Passengers were evacuated and negotiations with the police had started before Mikhail Ershov, 43, triggered the explosion, blasting out windows in the train carriage.

“Ershov had taken the pin out, he then tried to put the pin back in the grenade, but instead it exploded,” the prosecutor said.

The explosion did not kill or injure anyone else.