Colombia blasts devastate bars

Police are trying to determine the cause of the blasts

One person has been killed and at least 72 injured in explosions at two crowded bars in the Colombian capital, Bogota.

Police say the blasts were caused by either bombs or grenades - a suspected bomber has been arrested.

They have blamed the attacks on the country's largest rebel group, the Revolutionary Armed Forces of Colombia (FARC).

There is a long-running war in Colombia between guerrillas and the government.

It appears it was the FARC, like always National Police Chief General Jorge Castro

Correspondents say that the FARC has increasingly been bringing its campaign against the government to Colombia's cities.

The rebel group has been blamed for a series of city attacks in recent months, but has denied any responsibility.

Young victims

The explosions occurred within seconds of each other at about 2300 on Saturday night in the Zona Rosa district, which is filled with popular nightclubs and bars.

Everyone started running like crazy Jose Ramon Marceles Victim

The two bars targeted, the Bogota Beer Company and the Palos de Moguer - are frequented by foreigners.

Three US citizens and one German are said to be among the injured.

The majority of the victims are in their 20s. Eighteen are in a serious condition.

Jose Ramon Marceles, 26, who is recovering from leg injuries, said he was celebrating a friend's graduation at the Bogota Beer Company when the attacks happened.

FARC rebels were blamed for the attack

"I was stunned, I didn't know what had happened," he said. "Then there was another explosion, and a huge flare-up that came from the heat lamp. Then everyone started running like crazy."

Last month a car bomb killed at least six people in a southern Bogota suburb.

And in February a similar attack at a nightclub in the city killed 36 and injured 170.

The authorities say they have seized tons of explosives and arrested dozens of FARC guerrillas in recent months.