Israeli Prime Minister Benjamin Netanyahu on Friday slammed a UNESCO vote declaring the Old City of Hebron an endangered world heritage site, calling it a "delusional decision".

"It is another delusional decision by UNESCO," Netanyahu said in a Hebrew video posted online. "This time they ruled the Tomb of the Patriarchs is a Palestinian site, meaning not a Jewish site, and it is in danger."

The tomb is one of the holiest sites in Judaism.