Ammon News - UN Secretary-General Antonio Guterres is "deeply alarmed" by Sunday's strike by Israel on the Al-Ahli Arab Hospital in the Gaza Strip, his spokesman said Monday.

Guterres noted that under international humanitarian law, wounded and sick, medical personnel and medical facilities, including hospitals, "must be respected and protected," Stephane Dujarric said in a statement.

The statement came one day after a wave of Israeli strikes across Gaza hit the hospital and other sites, killing at least 21 victims, including children, according to media reports.

Guterres expressed his "strong concern" as aid continues to be blocked, with Israel not having allowed humanitarian aid or other essential supplies in for more than seven weeks, said Dujarric. Anadolu Agency