Colombia: Bomb kills at least 20

A powerful bomb rocked an exclusive club Friday night in Bogota, killing more than 20 people, leaving about 100 injured and setting the 10-story building on fire.

Bogota Mayor Antanas Mockus said a theory that the explosion may have been an accident had been discarded by investigators, who determined that explosives caused the blast.

It was the worst terrorist attack in Colombia since Pablo Escobar’s Medellin drug cartel unleashed a wave of terrorism in the 1980s and early 1990s.

The blast was heard for miles in Bogota, a city of 7 million. Experts estimated that at least 450 pounds of explosives were used.