Police officers escort a bomb attack suspect in Barranquilla, Colombia, on January 27, 2018. At least three police officers were killed and fourteen other were wounded when alleged drug traffickers detonated a remote controlled bomb at a station in the northern city of Barranquilla. Pic/AFP

Four police officers were killed and 42 others injured on Saturday when a bomb exploded outside a police station in Colombian city of Barranquilla, police said. The Colombian National Police Director General Jorge Hernando Nieto termed the attack "demented" and said: "I express all our solidarity ... with the families of the four police who have died thus far and with the more than 40 police who suffered some type of injury.