WARNING: GRAPHIC IMAGES – Maria Kosintseva survived as the killer stalked the flat with his gun. While hiding, she managed to send messages on social media begging for help

A teenager hid in a pool of blood under corpses pretending to be dead after a massacre at a party, Russian police said.

Maria Kosintseva, 16, survived uninjured as the killer stalked the flat with his gun.

The suspect, a computer game fanatic, went on the rampage at a party he hosted, shooting dead three guests and critically wounding another.

Dmitry Zakharov, 34, killed himself before police arrived at the property after the horror killings.

Polina Bardina, 18, died from a head wound and her friend Viktoria Paustovskaya, 17, suffered abdominal gunshot wounds.