Gunmen shot dead a Venezuelan judge at a street barricade in the latest fatality of two months of anti-government unrest that has seen at least 61 people killed, authorities said on Thursday.

Nelson Moncada, 37, was killed and stripped of his belongings as he tried to get away from the roadblock on Wednesday night in Caracas' El Paraiso district, the scene of regular clashes, the state prosecutor's office said.

This week has seen widespread violence around the Venezuelan capital, with security forces repeatedly breaking up marches by opposition supporters toward government offices downtown, and skirmishes continuing into the night.