SHOOTING AT COLLEGE killed 19...
National Guard soldiers were deployed to the massacre
An 18-year-old student ran through the technical college in Kerch, firing at fellow pupils before killing himself, Russian investigators say.
Officials and witnesses have also spoken of at least one blast caused by an unidentified explosive device; possibly an improvised explosive device.
Russia seized Crimea from Ukraine in 2014 in a move condemned by many Western powers.
The annexation marked the start of a simmering conflict involving Russian-backed rebels in eastern Ukraine still goes on and continues to this day.
What actually happened at the college?
The alleged perpetrator, named Vladislav Roslyakov, is reported to have run from room to room as he shot his gun, starting in the college canteen. He then shot himself dead, Russia's investigative committee said.
Officials said initial examinations suggested all the victims died of gunshot wounds, but some reports speak of shocking shrapnel injuries.
Soon after reports of a blast, investigators released a statement saying an explosive device filled with "metal objects" had detonated and set off in the dining area, several witnesses said that they heard one or more explosions.
Investigators later said they found a second device among the personal possessions of the gunman and that it had been disarmed.
BBC Russian has been speaking to witnesses, including Igor Zakharevsky, who was in the canteen when the gunman struck.
"I was at the epicenter of the first explosion, at the entrance, near the buffet," he said.
"I was in complete shock and one of my classmates started pulling me away. Then I heard several shots at intervals of two or three seconds. After a while, there was another explosion that had detonated."
Who were the victims?
A local official said most of the victims were students of the college, which is a vocational school for roughly 850 teenagers.
A major emergency response operation was launched as the victims were taken to hospitals. At least 40 people were injured.
Four military planes were ready to evacuate the wounded and military hospital facilities were ready to accept victims if necessary, Russian Defense Minister Sergei Shoigu said to the BBC.