UN Secretary-General António Guterres criticized the air attack that purportedly killed at least 22 people in Sudan on Saturday, according to a statement sent by a spokeswoman early Sunday.

At least 22 people were killed and hundreds were injured in an air raid by Sudan’s army on western Omdurman city on Saturday, according to the Khartoum state health ministry, as the country’s armed conflict entered its 12th week.

The secretary general is also appalled by reports of large-scale violence and casualties across Sudan’s Darfur region, according to the statement released by Farhan Haq, his deputy spokesperson.

“He is also concerned about reports of renewed fighting in North Kordofan, South Kordofan and Blue Nile States. There is an utter disregard for humanitarian and human rights law that is dangerous and disturbing,” it added.

Guterres reiterated his call for the Sudanese Armed Forces and its rival Rapid Support Forces to cease fighting and commit to a durable cessation of hostilities.