A woman died and seven police officers were wounded when a roadside bomb exploded as a police truck went down a street in Popayan, the capital of the southwestern Colombian province of Cauca, a police spokesman told Efe.
The bomb was detonated around 1:20 p.m. Tuesday in Lomas de Granada, a neighborhood on the southern outskirts of Popayan, the police spokesman said.
The bomb apparently targeted the mobile police squad, or Esmad, truck passing through the neighborhood.
The woman killed by the blast lived in the neighborhood, the police spokesman said.
"The woman received a serious shock and suffered a heart attack," the police spokesman told Efe.
The blast shattered the windows of several nearby buildings and damaged vehicles.
The wounded officers were taken to hospitals in Popayan for treatment of hearing damage and fractures.
The attack on the Esmad truck occurred a few hours after Revolutionary Armed Forces of Colombia, or FARC, guerrillas destroyed a portion of a bridge over the Ovejas River between Popayan and Cali on the Pan American Highway, forcing the road's closing for several hours.
The rebels destroyed part of the bridge's structure, leaving a large crater in the roadbed.
Army and police bomb specialists inspected the area around the bridge and engineers examined an old bridge located nearby that was opened to traffic.
The Colombian government has made fighting the FARC a top priority and has obtained billions in U.S. aid for counterinsurgency operations.
The FARC is on both the U.S. and EU lists of terrorist groups. Drug trafficking, extortion and kidnapping-for-ransom are the FARC's main means of financing its operations.
The FARC has suffered a series of setbacks in recent years at the hands of the Colombian security forces.
Alfonso Cano, the FARC's top leader, was killed on Nov. 4 in a military and police operation that the government hailed as the biggest blow to the FARC in its nearly 50-year history.
Cano, a 63-year-old intellectual who had entered the ranks of the FARC 30 years ago, was killed in in a remote area of the southwestern province of Cauca a few hours after fleeing a bombardment.
The FARC also suffered a series of blows in 2008, with the biggest coming in July of that year, when the Colombian army rescued a group of high-profile rebel-held captives: former presidential candidate Ingrid Betancourt, U.S. military contractors Thomas Howes, Keith Stansell and Marc Gonsalves, and 11 other Colombian police officers and soldiers. EFE