Vice President Dan Quayle, in a mission aimed at underscoring the U.S. commitment to El Salvador, issued a tough warning Friday that violence from all factions in the country must end or future American support could be endangered.

Quayle, on the Bush administration's first foreign policy trip, carried the stern warning to a variety of groups in the tiny Central American nation, including the two main political parties and the country's military leaders.Quayle said his purpose was to "convey a very emphatic, strong message that we condemn violence, period - violence perpetrated on the left and violence perpetrated on the right."