Malaysian officials say they have detained 93 ethnic Rohingya Muslims who fled Burma.
The officials say they seized a boat containing the men earlier this week.
Thai officials say their navy gave the men food and water when they entered Thai water.
Thailand has admitted to chasing off refugee boats in the past, but say that was not the case this time.
Burma's military government does not recognize ethnic Rohingya as citizens. More than 200,000 have fled Burmese state persecution to live in neighboring Bangladesh.
Some information for this report was provided by AP.