British police say they have evacuated 20-thousand people from the center of England's second-biggest city, after intelligence suggested a security threat.
Police began restricting traffic entering Birmingham's entertainment district Saturday night, before calling for an evacuation.
The city's center is packed with restaurants and nightclubs.
Specific information about the threat has not been released.
Birmingham is 175-kilometers northwest of London, where some 50 people were killed, another 700 injured, and many remain missing after four bomb blasts Thursday.
British authorities say the four bombs that devastated three subway trains and one bus were high explosives, not homemade devices, and were likely set off by timing devices.
Recovery crews are working to extricate bodies still trapped in a subway tunnel.
British officials say the London attacks bear the hallmarks of the al-Qaida terrorist network.