Multiple people have been killed and dozens injured in an attack at a college in the Crimean city of Kerch.
Authorities say 18 year-old Vladislav Roslyakov shot fellow students - before killing himself.
Many of the victims were teenagers.
Some had to be taken to hospital by any means possible.
The attack is being described by Russian officials as mass-murder - but not terrorism.
Witnesses described an explosion in the cafeteria - which blew out the ground floor windows of the two-story college - before shooting began.
(SOUNDBITE) (Russian) RUSSIAN INVESTIGATIVE COMMITTEE REPRESENTATIVE, SVETLANA PETRENKO, SAYING: "According to preliminary information, today an unidentified explosive device packed with metal objects went off at a cafeteria of Kerch Polytechnic college.
Information about the victims is being checked.
It is known that most of them are teenagers.
Explosives experts are at the scene " Military trucks and tanks are now stationed in the city.
Kerch and the rest of Crimea was was annexed by Russia from Ukraine four years ago.
President Putin has called for a careful investigation into the shooting: (SOUNDBITE) (Russian) RUSSIAN PRESIDENT, VLADIMIR PUTIN, SAYING: "I want to express condolences to the relatives of those who died and express hope that the victims will recover as soon as possible, and we will do everything possible for this." So far security officials haven't given a motive for the attack.