Tegucigalpa, Honduras (AP) — Ousted President Manuel Zelaya was kept from landing at the main Honduras airport Sunday because the runway was blocked by military vehicles and groups of soldiers, some of them clashing with a crowd of thousands outside.

His Venezuelan pilots circled around the airport and decided not to risk a crash.

Zelaya instead landed in Nicaragua on his way to El Salvador, and vowed to try again Monday or Tuesday in his high-stakes effort to return to power in a country where all branches of government have lined up against him.

“I am the commander of the armed forces, elected by the people, and I ask the armed forces to comply with the order to open the airport so that there is no problem in landing and embracing my people,’’ Zelaya said from the plane. “Today I feel like I have sufficient spiritual strength, blessed with the blood of Christ, to be able to arrive there and raise the crucifix.’’

But interim President Roberto Micheletti insisted on keeping him out, and said he won’t negotiate until “things return to normal.’’

“We will be here until the country calms down,’’ Micheletti said. “We are the authentic representatives of the people.’’

Violence broke out among the huge crowd surrounding the airport, with at least one man killed — shot in the head from inside the airport as people tried to break through a security fence, according to an Associated Press photographer at the scene. At least 30 people were treated for injuries, the Red Cross said, after security forces fired warning shots and tear gas.

When Zelaya’s plane was turned away, his supporters began chanting “We want blue helmets!’’ — a reference to U.N. peacekeepers.

Zelaya called on the United Nations, the OAS, the United States and European countries to “do something with this repressive regime.’’

Honduras’ new government has vowed to arrest Zelaya for 18 alleged criminal acts including treason and failing to implement more than 80 laws approved by Congress since taking office in 2006. Zelaya also refused to comply with a Supreme Court ruling against his planned referendum on whether to hold an assembly to consider changing the constitution.

Critics feared Zelaya might try to extend his rule and cement presidential power in ways similar to what his ally Hugo Chavez has done in Venezuela.

But instead of prosecuting him or trying to defeat him at the ballot box, his political opponents sent masked soldiers to fly Zelaya out of the country at gunpoint, and Congress installed Micheletti in his place.

The military solution drew condemnation at the United Nations, and Honduras was suspended by the OAS. Many called it a huge step backward for democracy, and no nation has recognized the new government. President Barack Obama has united with Chavez and conservative Colombian President Alvaro Uribe in insisting on Zelaya’s return.

Without OAS membership, the isolated interim government faces trade sanctions and the loss of hundreds of millions of dollars in subsidized oil, aid and loans for the impoverished nation.

The immediate concern, however, was avoiding more bloodshed. Both critics and supporters of Zelaya have staged large demonstrations. The country’s Roman Catholic archbishop and its human rights commissioner urged Zelaya to stay away to avoid provoking them.

Weissert reported from Tegucigalpa and Ikeda from Washington. Associated Press writers Freddy Cuevas, Marcos Aleman and Esteban Felix in Tegucigalpa; and Robert Burns and Jeanneth Valdivieso in Washington contributed to this report.