A gunman has opened fire at a university in Russia, killing at least eight people dead and leaving 24 wounded, officials have said.
According to the Interior Ministry, the gunman was detained after the shooting at Perm State University.
A video shows several people jumping from windows in order to escape the attack.
The shooter - identified in Russian media as 18-year-old Timur Bekmansurov - was shot dead at the scene.
In a social media post shortly before the attack, Bekmansurov wrote that he wanted to leave as much pain behind as possible, describing himself as "unstoppable".
He said he would "feel alive for the last ten minutes of my life".
He is understood to have been a student at the university, which is around 800 miles east of Moscow.
Another clip shows a man armed with a large weapon walking toward the university building.
A figure at Russia's interior ministry told RBC that three people were killed, while a university spokesperson told Reuters that four were injured.
A law enforcement source told Tass news agency : "On Monday, an unidentified person entered the university building and opened fire.
"Some students locked themselves in universities auditoriums to hide from the attacker. Some students jumped out of the windows. Law enforcement agents are heading to the site."
A clip shows people leaping from a first floor window as the attack unfolded.
Bekmansurov had reportedly posted on social media about getting a gun licence, and appeared to be in a distressed state of mind before the attack.
He wrote: “However long I’ve known myself, I’ve always thought of death.”
Russia's Investigative Committee, the agency that handles probes into major crimes, said the gunman had been identified as a student at the university.
In messages sent by the suspect before the siege, he was quoted saying he “liked causing pain to people”.
