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A van drives past a damaged building in the war-torn southwestern city of Taiz in Yemen on Wednesday. The UN chief has expressed alarm at the civilian casualties in attacks in Yemen. Image Credit: Reuters

United Nations: UN Secretary-General Ban Ki-moon repeated his call on Wednesday for all sides in the conflict in Yemen to “immediately cease all hostilities,” following a devastating series of raids resulting in numerous civilian deaths and injuries.

In a statement, Ban urged “all parties to the conflict to immediately cease all hostilities” and asked the Yemeni parties to return to direct talks facilitated by his special envoy for Yemen.

He reminded all parties “of the utmost necessity to protect civilians and to respect their obligations under international humanitarian law”.

Ban condemned a reported air strike that hit east of Sana’a in Nehm, killing at least nine civilians.

He also denounced an attack — reports of which appeared to come from Yemen — said to kill at least seven civilians when a workshop was hit on Tuesday in Najran, Saudi Arabia.

That blow caused Saudi Arabia’s worst civilian death toll in the kingdom’s south since the Arab coalition intervened in Yemen in March 2015.

“Civilians, including children, are paying the heaviest price in the ongoing conflict, as civilian infrastructure, such as schools and hospitals, continue to be hit,” he said.

The coalition’s spokesman accused Al Houthis of using the three months of negotiations to rearm.

“They were deceiving people by this negotiation, to reorganise their force, resupplying their forces and getting back to fighting,” Brigadier General Ahmad Assiri said.

He said the coalition would do “whatever it takes” to restore security in Yemen.

Ban expressed alarm at “the escalation of air strikes and ground fighting in Yemen and along the Saudi Arabia-Yemen border” since the suspension in early August of UN-brokered peace talks in Kuwait.

The United Nations says more than 6,500 people, mostly civilians, have been killed since last March and more than 80 per cent of the population needs humanitarian aid.