BEIJING?-?A Chinese regulator has urged local tourism authorities and travel agencies to step up safety checks at major tourist spots after a boat accident in waters off the eastern Malaysian state of Sabah.

In an emergency notice, the China National Tourism Administration (CNTA) demanded safety inspections at popular tourist attractions and recreation facilities that are most prone to accidents.

Ice-snow, coastal tourism and passenger transport are among the key areas that need strengthened safety inspections, according to the CNTA.

The notice came after a catamaran carrying over two dozen Chinese tourists and three crew went down in turbulent waters while heading for the popular island of Mengalum on Saturday.

Twenty-two people have been rescued, but three Chinese tourists have been confirmed dead. A further five Chinese tourists and a crew member are still missing.