Rescuers were searching Thursday for 43 people missing in rough seas overnight after a ferry carrying 65 people sank near Indonesia’s resort island of Bali.

At least four people were dead and dozens unaccounted for Thursday after a ferry sank on its way to the resort island of Bali, according to local authorities who said 23 survivors had been plucked from the water so far.

A ferry sank off the coast of Bali leaving four dead, 38 missing and 23 survivors, Indonesia’s rescue agency confirmed on Thursday.