He was jailed in 2008 for seven years after leaving a hoax bomb on a bus in Rotherham, South Yorkshire.

BBC: Jailed hoax bomber 'researched explosives' after release

The father-of-five denied communicating a hoax bomb threat with intent.

BBC: EDL bomb hoax message jury fails to reach verdict

Mr Mahmood, of Firth Park, Sheffield, denies communicating a bomb hoax.

BBC: Bristol

But the father-of-five denies communicating a bomb hoax.

BBC: EDL bomb hoax accused 'wanted to get under their skin'

On Friday, authorities announced that they had arrested two people, one for an alleged bomb threat and another for a hoax related to the Littleton shootings.

CNN: Littleton authorities warned about Harris' death threats

Police have now said a bomb alert in north Belfast was a hoax.

BBC: Bomb alert in north Belfast was a hoax

Mr. DOUGLAS: It had an effect on every level, because often, you would go to a concert or an opera and we had to get out three or four times because there was a bomb scare, real or just phoned-in hoax.

NPR: Orchestrating Goodwill for Northern Ireland