A car bombing outside a mosque in southern Syria killed dozens of people on Friday, monitors told AFP.

At least 33 people, including 12 rebel fighters, were killed when the car blew up in front of the mosque in the rebel-held village of Yaduda in the southern Daraa province, the Syrian Observatory for Human Rights said.

Activists blamed regime forces for the attack, said the Britain-based monitor, adding that it expected the death toll to rise because many others were wounded in the explosion.

On another front, the jihadist Islamic State of Iraq and the Levant (ISIS) executed dozens of people as it was forced by rival rebels to withdraw from five villages including Hreitan, an opposition stronghold in the northern province of Aleppo, AFP reported.

Just before their withdrawal from the Hreitan area, ISIS fighters executed 27 people including 15 Islamist rebels, said the Observatory.

At least 11 rebels were also reported killed in the fighting.

In Azaz, elsewhere in Aleppo province, further clashes raged between rebels and ISIS, as the jihadists “beheaded at least four” rival opposition fighters, said the group.

Two children were killed in ISIS shelling on Akhtarin, a village in Aleppo province, while 11 members of the jihadist group were killed in the fighting.

In recent weeks, a new front in Syria’s nearly three-year-old conflict opened when powerful rebel groups combined to attack bases of ISIS, who is even worse than the regime of President Bashar Al-Assad.

The jihadists were initially welcomed by other rebels, but allegations of brutal abuses against civilians as well as rival opposition fighters sparked a backlash, and even accusations that they were serving the interests of the regime.

ISIS has executed dozens of rival Islamists as the group recaptured most territory it had lost in the northeastern Syrian province of Raqqa.

In the city of Aleppo, at least five soldiers were killed and 18 others wounded when Islamist rebels detonated mines under the Carlton hotel used by the army, the Observatory told AFP.

It said the rebels had dug tunnels under and around the Carlton and on Friday morning they set off mines to detonate them.

Fierce battles broke out after the attack, killing an unknown number of rebels, it added.

This week, hundreds of people fled the city of Homs, which has been under siege for over 18 months. This was made possible after a temporary ceasefire in the region was agreed upon.

(Arutz Sheva’s North American Desk is keeping you updated until the start of Shabbat in New York. The time posted automatically on all Arutz Sheva articles, however, is Israeli time.)