
During the trip, the diplomat also met with the two main candidates in Honduras' Nov. 29 elections, as well with the leftist Popular Block, an umbrella group of farm, labor and student groups that largely supports Zelaya.
But he said he would not see Roberto Micheletti, whom Congress named president after Zelaya's ouster, in order to avoid legitimizing the government.
Micheletti's foreign minister, Enrique Ortez, said that Insulza "can negotiate all he wants, except for Zelaya's situation."
"That is not negotiable because he cannot return to Honduras, and if he does he will be arrested and tried," Ortez said.
Zelaya, who was traveling in Central America, planned to return to Honduras on Sunday, according to Nicaraguan President Daniel Ortega. Zelaya has said he would be traveling with Insulza and the presidents of Argentina and Ecuador.
Honduras' interim government has said it will arrest Zelaya if he returns, setting up a potentially volatile showdown.
Contrary to assertions by the Micheletti government, Interpol on Friday released a statement saying it had not received any request to issue an arrest warrant for Zelaya.
Micheletti led a raucous chant of "Democracy!" before a giant crowd waving blue-and-white Honduran flags in front of the palace that Micheletti has occupied since Zelaya was seized by soldiers. He pledged to stand firm in the face of the international pressure.
"I am the president of all Hondurans," he proclaimed.
A rival rally by thousands of Zelaya backers marched to the offices of the OAS. Marchers carried a banner with a picture of Zelaya and the words: "Mel our friend, the people are with you!"
Despite feared violence, the two groups did not clash. Police helicopters circled overhead and dozens of soldiers and police guarded the palace.
Micheletti's supporters say the army was justified in ousting Zelaya — on orders of Congress and the Supreme Court — because he had called a referendum which they claim he intended to use to extend his rule. Zelaya denies that and has said he will no longer press for constitutional changes.