Argentina's government has asked Honduran Ambassador Carmen Eleonora Ortez Williams to cease her work in the country because of her public support for the June 28th coup that deposed President Manuel Zelaya.
Mr Zelaya asked Argentina's Foreign Minister Jorge Taiana to take the decision during a meeting in Quito last weekend, according to a statement from the foreign ministry.
The ministry said Argentina's relations with Honduras will be conducted through Honduras's embassy in the United States.
Yesterday, Honduras' interim president appeared to reverse course and reject any official visit by the head of the Organization of American States, days after his government said OAS chief Jose Miguel Insulza could come as an observer with a diplomatic delegation.
The delegation initially intended to visit Honduras this week in a bid to resolve the dispute over the June 28 coup that ousted President Manuel Zelaya.
But the mission was postponed as the interim government publicly questioned Insulza's objectivity and said he could participate only as an observer.
Mr Micheletti told reporters yesterday that Insulza was not welcome except as a tourist.
"We don't want him to come," Mr Micheletti said. "He has no business coming to this country to impose anything.
"For us, he is not welcome in this country unless he comes as a tourist, to spend dollars ... for the good of our businessmen."
The comments came the same day that Mr Insulza held a rare meeting with representatives of the interim government, which is not recognized by the OAS, at his home in Washington.
"We had a very long, very interesting and, I think, very constructive conversation," Mr Insulza said in a news release. It was not clear if Insulza still intends to be part of the OAS delegation of foreign ministers and other officials.
In the Honduran capital, about 5,000 Zelaya supporters gathered in front of the heavily guarded offices of federal investigators, demanding information about the whereabouts of 27 pro-Zelaya demonstrators arrested the previous day.
Mr Zelaya, who was rousted from his home at gunpoint in June and flown into exile by Honduran soldiers, spent the day in Chile, his latest stop on a Latin American tour he hopes will solidify backing from the region's governments.
The Honduras coup has been widely condemned around the world, and the United States and the European Union have called for Mr Zeyala's return to the presidency.
Mr Micheletti's interim government has refused to consider Zeyala's restoration - which is a key provision of an accord proposed during the San Jose talks mediated by Costa Rican President Oscar Arias, a Nobel Peace Prize laureate.
Chile's President Michelle Bachelet received Mr Zelaya with head-of-state honors and reiterated her government's recognition of him as the democratically elected president of Honduras.
"We will continue to support all actions" aimed at restoring Mr Zelaya to the presidency, said Bachelet, whose country saw a CIA-backed coup in 1973 that ushered in the dictatorship of Gen. Augusto Pinochet.
Agencies