Asia's migrant crisis
Rohingya Muslims mainly live in Myanmar, where they have faced decades of persecution.
Rights groups say migrants feel they have "no choice" but to leave, paying people smugglers to help them.
The UN estimates more than 120,000 Rohingyas have fled in the past three years.
Traffickers usually take the migrants by sea to Thailand then overland to Malaysia.
But Thailand recently began cracking down on the migrant routes, meaning traffickers are using sea routes instead.
Why are so many Rohingya stranded at sea?
The perilous journey of a migrant boat that made it
The Indonesian villagers saving migrants