Some man burst into the building, blinded the building's security guard from a spray bottle

An unknown assailant on Monday forced his way into the office of a Russian radio station that is critical of the Kremlin and stabbed a presenter in the neck before he was detained, the chief editor told AFP.
"Some man burst into the building, blinded the building's security guard from a spray bottle, then came up to our floor," said Echo of Moscow editor-in-chief Alexei Venediktov.

"He broke in and stabbed our presenter Tatiana Felgengauer in the neck with a knife," he told AFP. "My security guards overcame him, and we handed him over to the police."

Source:AFP