When Tha Peng was ordered to shoot at protesters with his submachine gun to disperse them in the Myanmar town of Khampat on Feb 27, the police lance corporal said he refused. 

"The next day, an officer called to ask me if I will shoot," he said. The 27-year-old refused again, and then resigned from the force.

On March 1, he said he left his home and family behind in Khampat and travelled for three days, mostly at night to avoid detection, before crossing into India's northeastern Mizoram state.

"I had no choice," Tha Peng told Reuters in an interview on Tuesday, speaking via a translator. He gave only part of his name to protect his identity. Reuters saw his police and national ID cards which confirmed the name.

Tha Peng said he and six colleagues all disobeyed the Feb 27 order from a superior officer, whom he did not name.

Reuters could not independently verify his or other accounts gathered near the Myanmar-India border.

The description of events was similar to that given to police in Mizoram on March 1 by another Myanmar police lance corporal and three constables who crossed into India, according to a classified internal police document seen by Reuters.

The document was written by Mizoram police officials and gives biographical details of the four individuals and their account of why they fled. It was not addressed to specific people.

"As the Civil disobedience movement is gaining momentum and protest(s) held by anti-coup protesters at different places we are instructed to shoot at the protesters," they said in a joint statement to Mizoram police.

"In such a scenario, we don't have the guts to shoot at our own people who are peaceful demonstrators," they said.

Myanmar's military junta, which staged a coup on Feb. 1 and deposed the country's civilian government, did not respond to a Reuters request for comment.

Around 100 people from Myanmar, mostly policemen and their families, have crossed over a porous border into India since the protests began, according to a senior Indian official.