PATTAYA, Thailand: Thai protesters smashed their way into a major Asian summit yesterday, forcing the country’s embattled prime minister to cancel the meeting and evacuate foreign leaders by helicopter.

Premier Abhisit Vejjajiva declared a state of emergency in the beach resort of Pattaya after thousands of demonstrators stormed the summit, which was supposed to focus on the financial crisis and North Korea’s rocket launch.

Choppers plucked dignitaries from the roof of the luxury hotel venue after the red-shirted supporters of ousted Thai leader Thaksin Shinawatra breached police lines, broke down glass doors and streamed into the building unopposed.

The collapse of the summit piles more pressure on British-born Abhisit, who has pledged that his four-month-old government will heal years of political turmoil since Thaksin was ousted in a 2006 coup.

“The government has a duty to take care of the leaders, who will depart from Thailand,” Abhisit said in a somber nationwide address broadcast live on television.

The meeting — the biggest international gathering since the G-20 summit in London earlier this month — grouped the 10-member Association of Southeast Asian Nations (ASEAN) with China, Japan, South Korea, India, Australia and New Zealand.

Protesters said they had run out of patience with Abhisit’s refusal to bow to their demands for his resignation, and that they were angry at the wounding of several supporters in earlier clashes with pro-government rivals.

“The ‘Red Shirts’ have been asking him to resign for four months and we decided that now was the time to push him,” Pichet Sukjindatong, one of the protest leaders, said inside the building.

Hooting horns and triumphantly chanting slogans, the protesters decked out in red pushed past lines of troops who carried shields and batons but offered little resistance.

They toppled metal detectors, smashed reception tables and left behind puddles of blood where some had been injured by glass.

About 100 demonstrators got as far as the driveway of an adjacent building where ASEAN leaders were holding a lunch meeting to thrash out a new schedule for the talks, after protest blockades had scrapped the morning’s itinerary.

Hotel staff quickly cleared the restaurants and hustled tourists out of the pool as the protesters staged a sit-in at the heart of the summit, blocked by security forces with flak jackets and shotguns.

Within minutes of the cancellation, several foreign leaders including Philippine President Gloria Arroyo and Abhisit himself were airlifted to a nearby military airbase where emergency planes were on standby.

The demonstrators soon dispersed and within hours all the visiting leaders had been evacuated. Abhisit made a surprise return to the summit venue late yesterday to say the state of emergency had been lifted.

Thaksin, a billionaire tycoon who is living in exile to avoid a jail term for corruption, later addressed around 15,000 supporters in Bangkok by telephone from an unknown foreign location, police said.

“I thank the Red Shirts in Pattaya who showed strength. In the next few days we will see real change,” he said. “Red Shirts in Bangkok and elsewhere must now act immediately so that we can change our country.”

Officials did not say if or when the ASEAN summit would resume. It has already been postponed and shifted to new venues several times in an attempt to dodge the protest threat.

UN Secretary-General Ban Ki-moon regretted the cancellation of the summit. “I deeply regret the postponement of the ASEAN and related summits and the consequent postponement of my attendance to the events,” Ban said in a statement from neighboring Laos, where he was on a short visit.

“I hope for an early restoration of normalcy in Thailand and for the settlement of differences through dialogue and peaceful means,” said Ban.