Dhaka (Web Desk): At least 12 Rohingya refugees, mostly children , drowned when their boat capsized on the way to Bangladesh, police said on Monday, the latest victims of violence in Myanmar that has forced more than half a million people from their homes.

Border Guard Bangladesh (BGB) official Abdul Jalil told a foreign news agency at least 12 bodies had been recovered after an all-night rescue operation, saying "they include 10 children , an elderly woman and a man".

At least 13 Rohingya , including three women and two children , were rescued after scouring the estuary of the Naf river, Jalil said.

Area coastguard commander Alauddin Nayan said the boat sank in the mouth of the Naf river near Shah Porir Dwip, on the southern tip of Bangladesh, with nearly 100 people on board.

More than half a million Rohingya have emptied out of northern Rakhine and into Bangladesh since August 25, carrying stories of mass killings, gang rapes, and razing of whole villages.

Myanmar has denied allegations of ethnic cleansing, saying the military offensive was a "clearance operation" to flush out Rohingya fighters who had staged attacks on border posts in August.