Police reopened Forbes Avenue between Craig Street and Morewood Avenue yesterday afternoon after determining that there was no bomb in a car they stopped on the Carnegie Mellon University campus.

The streets, reopened about 2:20, had been closed for more than an hour after 911 received a call about someone putting a bomb in a white car.

City police spotted the car at Centre Avenue and Morewood and followed it along Morewood before pulling it over in a parking lot off Forbes Avenue near CMU's Hamburg Hall.

Police found a silver cylinder in the back seat of the car and called in the Allegheny County bomb squad. Bomb squad members determined that the cylinder, which resembled a WWII-era practice bomb, was not dangerous. But police were checking out some type of liquid inside the car.

The driver was detained for questioning, said police spokeswoman Diane Richard.