Stephen O’Brien, the humanitarian chief of the United Nations said that he is “horrified” by the attacks on civilians in Syria at a press conference in Damascus on Monday.
“Attacks on civilians are unlawful, unacceptable and must stop,” O’Brien said.
He was “particularly appalled” by air strikes which killed at least 96 people on Sunday in the rebel-held town of Douma.
The Syrian Observatory for Human Rights who monitors the conflict said that air force jets fired at least 10 rockets at the town’s central market and attacked again after rescue workers arrived.
One video showed a marketplace completely destroyed with surrounding buildings in ruins and vehicles on fire.
O’Brien appealed “to each and every party to this protracted conflict to protect civilians and respect international humanitarian law,” in a statement released by the U.N.’s Office.
He also condemned rival army for cutting off the water supply in Damascus and Aleppo in recent days, affecting at least seven million people.
“It is unacceptable for those engaged in conflict to use access to water and other services as a weapon of war,” he added.
He also remained concerns in the statement about 4.6 million Syrians who stuck in besieged zones and were hard to reached.
John Kirby, the State Department spokesman said “Yesterday’s air strikes, after the other recent market bombings and attacks on medical facilities, demonstrate the regime’s disregard for human life.”
At least four million Syrians have been forced to escape the country, and millions of others are internally displaced.