FARC guerrillas attacked a police patrol over the weekend in Samaniego, a city in the southwestern Colombian province of Nariño, damaging three houses but not wounding anyone, the National Police said.

The attack, which occurred around 3:30 a.m. on Sunday, was the fourth staged by the Revolutionary Armed Forces of Colombia, or FARC, in the province in recent weeks, the National Police commander in Nariño, Col. Hugo Diaz, told Efe.

"The police officers were verifying that the establishments had closed on time," Diaz said.

Guerrillas threw a bomb at the officers, "shattering the windows of three houses," Diaz said.

Several civilians have been wounded in the other attacks staged recently by the rebels, the police commander said.

"The FARC commits acts of terror in an effort to reduce the pressure we put on them in the area. They want to put on the pressure," Diaz said.

Nariño, a mountainous province on the border with Ecuador and situated on the Pacific coast, has been severely affected by Colombia's internal conflict over the past few decades because of its strategic location and role as a production center for illegal crops.

Drug traffickers and the smaller National Liberation Army, or ELN, guerrilla group also operate in the province. EFE