Bangladeshi authorities have destroyed about 20 boats that ferried Rohingya Muslims fleeing violence in Myanmar, accusing smugglers of using the huge exodus to bring methamphetamine into the country.

Refugees told Reuters that border guards also beat and arrested passengers and crew as they landed at Shah Porir Dwip, on the southern tip of Bangladesh on Tuesday night, before the vessels were smashed to pieces by locals.

The local commander of Border Guards Bangladesh (BGB), Lt. Col. Ariful Islam, denied there were beatings, and said the action was a crackdown on human trafficking and the smuggling of methamphetamine, a drug known locally as "ya ba.