A group of Israeli archaeologists is protesting about fresh excavations at Jerusalem's holiest religious shrine, saying it threatens priceless relics.

Muslim authorities at al-Aqsa mosque, also venerated by Jews as the Temple Mount, are digging a 150-metre trench for water pipes and electricity cables.

Israeli critics say the work is causing irreparable damage, indiscriminately piling up earth and carved stones.

Mosque officials insist it is urgent infrastructure work doing no damage.