Firework Led Birmingham Evacuation

The BBC reports that one of the suspect packages which caused the evacuation of Birmingham contained a stage firework:
About 20,000 people were forced to leave the area on Saturday evening:

Ch Supt Peter Goodman said West Midlands Police had received intelligence which gave a "credible and specific" threat.

He said a box with wires and a switch was found in a hotel room and a separate package was reported on a bus.

Both turned out to be harmless, but police said they reinforced the information that the city had been targeted.

[. . .]

During the search they came across the pyrotechnical device in a room at the Premier Travel Inn.

A man has been interviewed but no further action is to be taken against him.

In a separate incident, a member of the public reported a suspicious package on a bus in the city centre. Bomb disposal experts were called in and carried out four controlled explosions.