According to AP news

YANGON, Myanmar -Myanmar said the Rohingya boat people found adrift in the Andaman Sea last week could not have come from its shores because they are not among its recognized ethnic groups, state media reported Friday.

The Myanmar Ahlin, a state-controlled newspaper in Myanmar, said that foreign media had suggested that the hundreds of Rohingya found off Thailand’s coast came from Myanmar. That was not possible, the newspaper said.

“Rohingya people are not among Myanmar’s more than 100 ethnic minority groups,” the newspaper said.

However, the newspaper reported that the government will “take necessary measures and deal with the matter.”

The newspaper did not elaborate, though on Monday, Myanmar military leaders told their Thai counterparts they would try and prevent any Rohingya migrants from leaving the border with Bangladesh .

The issue of the Rohingyas — several hundred thousand people who live along the border with Bangladesh — is very sensitive in Myanmar.

About 200,000 Rohingyas live in Bangladesh, where about 28,000 live in camps and have been granted refugee status. Many more brave the seas in search of a better life, often traveling to Thailand on their way to Malaysia.