In Colombia, a suspected car bomb has exploded near the studios of a private radio station in the north of the capital, Bogota. The blast damaged the office block housing Caracol Radio on the city's main 7th Avenue. It also blew out the windows of nearby buildings and cars. According to Caracol Radio, at least nine people were injured. The head of the Colombian National Police, Gen Oscar Naranjo, has appealed for calm while an investigation takes place. President Juan Manuel Santos, who took office at the weekend, described the blast as a cowardly terrorist act.Bogota's police chief, Gen Cesar Pinzon, blamed leftist rebels for the car bomb, but added that officers were not yet sure if the bomb was aimed at the radio station or at several nearby bank headquarters.