CCTV footage has captured the moment masked robbers raided a coffee shop, and beat staff with hammers and bats.
Customers, including children, fled in terror as four attackers entered the Coffee Kup in Birmingham city centre.
The gang chased after and then beat staff as they hide behind the counter for protection.
Two staff members were on duty at the time; both can be seen trying to fend the attackers off.
The security guard was left with a broken hand and arm.
The robbery happened just after 6pm on 18 October.
Lakh Dhillon, co-owner of the Coffee Kup, believes the gang were also armed with a screwdriver.
Mr Dhillon said that a member of staff saw a black BMW pull-up outside the shop, and raised the alarm after seeing the four attackers leave the car.