MEXICO CITY, June 29 (RIA Novosti) - Honduran President Jose Manuel Zelaya, deposed in a coup on Sunday, has flown from Costa-Rica to Nicaragua to take part in an emergency regional summit, Mexican media reported on Monday.

Venezuelan leader Hugo Chavez provided his personal plane to take Zelaya to the summit, which will see the participation of over 15 regional leaders, including those of Mexico, Ecuador and Cuba. The situation in Honduras will top the agenda.

Chavez, one of Zelaya's strongest allies, also threatened military action if Venezuela's envoy in Honduras was attacked.

Honduran military arrested Zelaya on Sunday morning, the same day polls were due to open for a referendum on the extension of his non-renewable four-year term of office.

The country's Supreme Court had ruled the referendum illegal. The president was arrested at his residence and transported aboard a military plane to Costa-Rica in what was Central America's first coup since the end of the Cold War.

Interim president, Roberto Micheletti, imposed an overnight curfew in the country after taking power. However, Zaleya supporters have set up barricades near the presidential place and there have been unconfirmed reports of shots being fired.

Honduran trade union leader Angel Alvarado has called for a nationwide strike in support of Zelaya.

World leaders have condemned the coup, with UN Secretary General Ban Ki-moon urging "the reinstatement of the democratically elected representatives of the country". U.S. President Barack Obama has called on the coup leaders to "respect the rule of law."

Former Cuban leader Fidel Castro called the coup a "suicidal mistake" in an article published early on Monday.