Police say the blast partially damaged about 100 homes and the offices of a national radio station.

CNN: Powerful bomb explodes in Medellin

Each morning at 1:59 he sits up like this and turns off the clock radio in the split second before two and the shrill blast of alarm.

NPR: Excerpt: 'Citizen Vince'

If an aggressor launches a nuclear device of whatever size and detonates it above the atmosphere and in the line of site of its target country, the x-rays and gamma rays emitted by the blast will cause an electromagnetic pulse, or wave a million times stronger than the strongest radio wave.

CENTERFORSECURITYPOLICY: An urgent memo to the next government

Israeli Civil Defence Minister Avi Dichter told Israel's Army Radio that he could not say anything about the reported blast "beyond what I heard in the media".

BBC: Iran denies reports of explosion at Fordo nuclear site