UNITED NATIONS - Violence is intensifying across Sudan's North Darfur state following the takeover of the state's capital, El Fasher, by the Rapid Support Forces, UN humanitarians said Tuesday.

Multiple air and drone strikes were reported across the areas of El Fasher, Tina and Wana Mountain on Sunday, said the UN Office for the Coordination of Humanitarian Affairs (OCHA).

Local sources reported civilian casualties, but OCHA said it was unable to verify the reports due to limited access and the difficulty of communicating with people in the affected areas.

On Monday, Tedros Adhanom Ghebreyesus, director-general of the World Health Organization, condemned continued attacks on healthcare in Sudan, after the Kernoi Pediatric and Maternity Hospital in North Darfur was struck, resulting in at least four deaths and three injuries. He said that such attacks on healthcare must stop everywhere.

OCHA said that despite the hazardous operating environment, the United Nations and its partners continue to deliver life-saving assistance wherever access permits.

It added that the world body and its partners are scaling up therapeutic feeding and vitamin supplementation programs. At the same time, efforts continue to ensure safe deliveries and emergency care for pregnant women through mobile clinics.

The office said that in Sudan's Kordofan region, the security situation is also worsening. Local sources reported that at least 40 civilians were killed and dozens injured on Monday in an attack on a funeral gathering in El Obeid, the capital of North Kordofan state.

"Once again, OCHA calls for an immediate cessation of hostilities and for all parties to protect civilians and respect international humanitarian law," the office said.