BOGOTA, Colombia (AP) _ Gunmen forced 13 villagers from their homes one by one Friday and fatally shot them in the head, police said.

The killings in the northern Colombian town of Guatape in Antioquia state come two days after an alleged paramilitary massacre in the same region.

TV footage showed several bodies covered in blood-soaked sheets.

It wasn't immediately clear who was responsible for the slayings, state police Col. Guillermo Aranda said. Guatape is 140 miles from Colombia's capital, Bogota.

On Wednesday, about 100 paramilitary gunmen rounded up and killed 11 suspected guerrilla sympathizers in Yolombo, 30 miles from Guatape, a state prosecutor said.

Fighting involving leftist guerrillas and rival paramilitaries is common in battle-torn Antioquia state.

Paramilitary groups are responsible for more than 70 percent of Colombia's human rights abuses, most of them massacres of unarmed civilians, a recent Human Rights Watch report said.