Officials in Guatemala say three Salvadoran representatives to the Central American Parliament have been killed, and their bodies burned along with their driver.
The charred remains of the four bodies and their bullet-riddled vehicle were found late Monday outside the capital of Guatemala City, where the Central American Parliament is based.
A search for the deputies began after they failed to show up at their hotel.
Interior Minister Carlos Vielman says the dead include Eduardo D'Aubuisson, the son of Roberto D'Aubuisson.
The elder D'Aubuisson founded El Salvador's ruling party, the right-wing Nationalist Republican Alliance, and was alleged to have been involved in the killing of Archbishop Oscar Arnulfo Romero in 1980.
The two other legislators were William Pichinte and Jose Ramon Gonzalez.
Authorities have not named any suspects or a possible motive.
Some information for this report was provided by AFP, AP and Reuters.