ANKARA, Turkey — Authorities recovered the bodies Tuesday of at least 36 migrants who drowned off Turkey after their boats overturned in rough waters as they tried to reach the Greek island of Lesbos, officials and news reports said. Twelve others were rescued.

Nine bodies, including those of children, washed up on a beach in the resort town of Ayvalik early in the morning, prompting authorities to dispatch coast guard boats and gendarmerie officials to search the area by sea and by land for possible survivors.

Seven other bodies were washed up on a shore at Dikili, a resort about 30 miles south of Ayvalik, the victims of a second migrant tragedy, the private Dogan news agency reported. The dead included women and children, the agency said.

By late afternoon, the gendarmerie forces had recovered a total of 29 bodies in the area while seven others were found by the coast guards, a coast guard statement said, without providing details.

Around 850,000 migrants crossed into Greece last year, paying smuggling gangs to ferry them over from Turkey in frail boats.

Undeterred by the bitter cold and the rough winter seas, migrants are continuing to risk the journey to Greece in the hope of a better future in Europe. Most of them are Syrian refugees escaping the civil war.

The International Organization for Migration estimates that 3,771 migrants overall died while trying to cross the Mediterranean Sea to Europe last year. The group says that makes it the deadliest year on record for migrants crossing the Mediterranean, with the number of deaths rising from 3,279 in 2014.

The group said 2,892, or 77 percent, of the deaths last year were on the central Mediterranean route, mainly involving people crossing from Libya. However, there were 805 deaths in the eastern Mediterranean, accounting for 21 percent of the total. That’s 1 percent more than the previous year, reflecting the increasing popularity of that route.

Associated Press