The so-called 'Islamic State' group has claimed responsibility for a twin bombing has struck a crowd in a predominantly Kurdish town in northern Syria, killing 44 people and wounding dozens more.
A truck loaded with large quantities of explosives blew up on the western edge of the town of Qamishli, followed by an explosives-packed motorcycle a few minutes later in the same area.
The blasts caused massive damage and rescue teams have been working to recover victims from under the rubble, the SANA news agency said.
Qamishli, near the Turkish border, is mainly controlled by Kurds but Syrian government forces are present and control the town's airport.
Syrian state TV broadcast footage showing people running away from a mushroom of grey smoke rising over the town and others running amid wrecked or burnt cars.
Qamishli resident and writer Suleiman Youssef, said he heard the first explosion from few miles away.
He said the blasts levelled several buildings and many people were trapped under the rubble.
"Most of the buildings at the scene of the explosion have been heavily damaged because of the strength of the blast," he said.
The 'Islamic State' group, in a statement published by the 'IS'-linked Aamaq news agency, said it carried out the attack in Qamishli.
The extremist group described it as a truck bombing that struck a complex of Kurdish offices.
The group has carried out several bombings in Kurdish areas in Syria in the past.
The predominantly Kurdish US-backed Syria Democratic Forces have been the main force fighting 'IS' in northern Syria, capturing significant territory from the extremists over the past two years.
Wednesday's explosion came as US-backed Kurdish forces pressed ahead with their offensive to take the 'IS'-held town of Manbij, also in northern Syria but further to the east of Qamishli.