Armed police units, complete with dog handlers, flooded Pall Mall and Prussia Street in Liverpool city centre last night. It followed terrified reports of a man wielding a weapon in his underwear roaming the streets. Quick-thinking staff at the Institute of Contemporary Music Performance (ICMP) pulled down their safety shutters. They barricaded dozens of panicked students inside the building for roughly two hours. Officers searched the immediate area and entered the college premises before safely lifting the lockdown and allowing students to leave.