CCTV images capture the moments before Dmitry Vinogradov embarks on a deadly shooting spree.

The 30 year old lawyer is seen arriving for work at his pharmaceutical firm in Moscow, before arming himself with two semi automatic rifles.

As he disappears out of screen, he shoots four men and women and their desks.

A cleaner is seen fleeing.

Vinogradov gave himself up to security guards after the shootings - believed to be a drunken rampage after his girlfriend left him.

Investigators say Vinogradov left a gruesome letter on his social media page before the killings, expressing a bitter hatred of those around him.