At least 18 people were killed when an inflatable boat carrying migrants sank off Turkey's western province of Mugla on Wednesday, the coastguard said in a statement, adding that search and rescue efforts continued in the area.
The coastguard said the boat, with an outboard motor, was detected at 03:00 GMT off the coast of Mugla's Bodrum district, and that it tried to flee despite repeated warnings to stop.
The boat later took in water due to adverse weather and sea conditions in the area and sank, it added.
A coastguard helicopter and three boats were dispatched to the area for search and rescue operations, the coastguard said, adding that they had rescued 21 people so far.
The statement did not say where the boat had departed from or where it was heading.
The Aegean Sea is a frequent transit route for thousands of migrants attempting to cross from North Africa and the Middle East into Europe, particularly from Turkey, which hosts millions of refugees from Syria, Iraq, and Afghanistan.
Iran launched missiles and drones on US military sites in Kuwait and Bahrain early on Sunday, shortly after President Donald Trump threatened to wipe out the Iranian leadership if they did not stick to the interim agreement to end their war.
Pope Leo on Sunday expressed solidarity with people in Venezuela grappling with the devastating impact of twin earthquakes that struck the country earlier this week.
Temperatures were forecast to reach 40 degrees Celsius (104 degrees Fahrenheit) in parts of Europe on Sunday as storms moved into other areas, with France reporting 1,000 excess deaths during the record-breaking heatwave.
A helicopter belonging to Saudi oil giant Aramco 2222.SE crashed on Sunday in Ras Tanura on Saudi Arabia's eastern coast on the Gulf, west of the Strait of Hormuz, killing 14 nationals, the state news agency reported, adding that the cause was unknown.
Ukraine hit two Russian oil refineries in the regions of Krasnodar and Yaroslavl overnight, President Volodymyr Zelenskiy said on Sunday, as Kyiv ramps up pressure on Russia's fuel supply with its drone fleet.