Armed leftists seized the office of the Organization of American States in the capital of Honduras Friday, seizing 13 hostages. The guerrillas were reported yesterday to have pulled out of the building in Tegucigalpa and taken their prisoners to the National University.

Honduras, unlike neighboring El Salvador, has seen little political violence. It is ruled by the military which has been accused of no major human rights violations and has initiated steps to revive constitutional government.

A spokesman for the guerrillas said they belonged to the Revolutionary People's Union. A statement by one group accused the governments of Honduras and El Salvador of collaborrating in the "genocide of the people of El Salvador."

The two countries fought a brief war in 1969 and the OAS has maintained observers on their border while seeking a renewal of relations between them.

In San Salvador, United Press International reported that the death toll during a three-day general strike by leftists, ending Friday, was at least 175.

The Revolutionary Democratic Front, seeking the ouster of the ruling civilian-military junta, called for a nationwide work stoppage. Despite repeated bloody encounters between guerrilla and police forces, however, most workplaces were reported to have been little affected.