Dozens of ethnic Rohingya refugees were dead or missing after a boat with about 90 people aboard, including children, capsized and sank in bad weather off the coast of Myanmar over the weekend, according to media reports.

More than 20 survivors were detained by authorities in Myanmar's Ayeyarwady region, the U.S.-funded Radio Free Asia reported, citing residents in the coastal district of Shwe Taung Yan.

According to survivors, the boat, which was bound for Malaysia, ran into trouble within a couple of days after setting out from Sittwe in Myanmar's Rakhine State on May 19, the Ayeyarwaddy Times reported.