London, Feb 28 (IANS) A bomb squad was called to singer Ozzy Osbourne's book signing event after the cops caught a man with some handmade fireworks.

The 'Black Sabbath' rocker was signing copies of his autobiography when police officers spotted a man allegedly smoking marijuana at the event in a Barnes and Noble bookstore in Palm Beach Gardens, Florida.

The man tried to run away but was caught.

During the inspection, police found what appeared to be homemade fireworks in his backpack, as well as a quantity of marijuana.

A bomb squad was then called to the scene to dispose of the combustible materials, reports contactmusic.com.

According to a police spokesperson, the man is now facing drug possession charges.