At least 17 people were killed and 40 more sustained injuries in an ISIS terrorist attack on Syria’s eastern province of Dayr al-Zawr.

Three children were among those killed in ISIS terrorist group’s latest attack that targeted the town of al-Joura in the province, the Syrian Observatory for Human Rights reported on Monday.

“The shelling hit just before families were gathering to break the Ramadan fast,” the UK-based monitoring group’s director Rami Abdel Rahman said.

According to local sources, at least six shells fell on the city during the raid, injuring at least 40 people.

“Some of them are in critical condition, but the health situation in the neighborhood is deteriorating because of the lack of staff, medicine, and medical equipment,” a local activist said.

In another development, a mass grave has been discovered in Syria, shedding more light on the atrocities committed by ISIS terrorists.

According to a report by the Kurdish-language Forat news agency, the grave is located in a desert area, about 4 kilometers east of Tabqa, which was captured by the Kurdish forces earlier this month.

Syrian forces have already found a number of mass graves in areas under terrorists’ control. The corpses in most cases showed signs of torture and mutilation.