There are more than 100,000 registered refugees from Myanmar living in neighbouring Thailand. Another two million could be living there illegally.
They escaped harsh conditions in Myanmar and the Thai government has promised not to send them back home.
But many of the refugees say they are being harrassed by Thai troops who frequently threaten to force them out of the country.
Aela Callan reports from the border between Thailand and Myanmar, where the number of refugees appears to be suspiciously dropping.