VILLAVICENCIO, Colombia?A car bomb exploded in a provincial capital of Colombia Sunday, killing 12 people, wounding dozens and stoking fears that Colombia’s civil war is becoming one of indiscriminate terrorist attacks.

A small explosive device had gone off minutes earlier, attracting people who were in surrounding bars and restaurants. Then the bomb?located underneath a car in a nearby parking lot?blew up, shredding bodies and causing damage in a four block-wide area.

No one claimed responsibility for the blast in Villavicencio shortly after 1 a.m., but police suspected the country’s main rebel group, the Revolutionary Armed Forces of Colombia, or FARC, was behind it.

The rebels have increasingly turned toward civilian targets since peace talks with the FARC collapsed on Feb. 20.

Authorities have posted a $7,000 reward for identifying the attackers.