A spokesman for Malaysia's Maritime Agency said they had sent one boat to the area to search for survivors and was sending two more.
Malaysia's New Straits Times said the boat sank around midnight on Tuesday about two miles (3 km) from the coastal town of Banting on the Strait of Malacca.
More top news
An Olympic silver-medallist at London 2012 has won gold after the 'winner' was stripped of his award.
Five migrants have died and more than 500 rescued after an overcrowded fishing boat capsized off the coast of Libya, the Italian navy said.
A Muslim Bataclan survivor has critised The Eagles of Death Metal frontman for saying the attacks were part of a Muslim conspiracy.