Anti-government protesters in Thailand have broken through a gate and forced their way into the prime minister’s office compound as police stood by and watched.

Thailand’s prime minister has rejected the demands of anti-government protesters locked in street battles with police, saying what they want is unacceptable under the constitution.

President Barack Obama kicked off a three-country Asian tour with a visit to Thailand, using his first post-election trek overseas to try to show he is serious about shifting the US strategic focus eastwards.