What is known about Crocus City Hall shooting so far

What is known about Crocus City Hall shooting so far? A shooting spree erupted on Friday at the major music venue located in Krasnogorsk, a city in the north-west of the Moscow region. What do we know about the incident? • At least three people in camouflage burst into the ground floor of the Crocus City Hall venue and opened fire with automatic weapons. The gunmen then threw a grenade or an incendiary bomb, which started a fire in the venue, according to a Sputnik correspondent. • Audience members lay down on the floor to escape the shooting. After 15 to 20 minutes they began to move towards the exit. • The Special Rapid Response Unit (SOBR) and Special Purpose Mobile Unit (OMON), as well as firefighters, rushed to the scene of the incident. • More than 50 ambulance teams have been dispatched to the site • The concert hall is on fire, authorities are evacuating people from the building, while the firefighters are trying to put out the flames. At least 100 people have been escorted... Source: Geopolitics Live