At least four illegal immigrants died when a boat sank off Turkey’s Aegean coast on Wednesday, local media reported.

According to the state-run Anadolu Agency, the mishap occurred near the Karaburun District in the province of Izmir.

The coast guards found four bodies in the sea, rescued one woman, and were still searching for 30 others who were reported missing, Xinhua news agency quoted the agency as saying.

The refugees were believed to have tried to sneak into a Greek island, said Anadolu.

The Aegean Sea was the main route for refugees fleeing into Europe via Turkey.