A councilman belonging to the leftist PDA party in Sucre, a city in the southwestern Colombian province of Cauca, was gunned down at his house, the political party said Sunday.

Gilberto Daza was shot and killed on Saturday night, the PDA said in a statement.

"At his house in the city, a block from the police station and in a militarized municipality, social leader and Councilman Gilberto Daza was murdered by hitmen who fled on a motorcycle," the party said.

The 43-year-old Daza had served as a councilman for 14 years and "had led all the fights for the defense of the interests of the people," the party said, adding that the politician had received death threats.

"He had been threatened repeatedly by telephone, something that was known by the authorities, and protection had been requested officially without a response," the PDA said.

Daza "opposed the Departmental Water Plan, the large-scale mining in the area, the privatization of the municipal waterworks and had been gathering information in recent weeks to lay out his position against the declaration of a duty-free zone in Sucre," the party said.

Daza's murder "shows the absence of guarantees for the left in the electoral process," Congressman Ivan Cepeda, a PDA member, said.

Guarantees for the right to belong to the political opposition in Colombia is one of the issues being discussed by the government and the Revolutionary Armed Forces of Colombia, or FARC, at the peace talks that started in Havana in November 2012. EFE