BOGOTA, Colombia (AP) _ Rebels in western Colombia kidnapped at least 25 workers from a company that repairs electric towers, the military said.

The workers were en route Friday to repair a tower knocked down by guerrillas of the National Liberation Army in Guatape, 125 miles northwest of Bogota, the military said.

The 5,000-strong ELN, Colombia's second largest rebel force, opposes the privatization of Isagen, the state electric company, and has been blamed for many attacks on electrical transmission towers.

In Barrancamermeja, 165 miles northeast of Bogota, a mother and her 12-year-old son died in a bomb attack Friday that authorities blamed on the nation's largest rebel group, the Revolutionary Armed Forces of Colombia, or FARC.

Seven other people were injured, police said.

Authorities said three bombs were launched against a military facility, but they hit nearby houses.