Gulf coalition warplanes have pounded Yemen’s Houthi-held capital Sana’a after rebels struck Saudi oil installations, in a surge of violence that threatens to shatter a peace deal.

The Houthi health ministry said six civilians were killed and 60 wounded, including two Russian women working in the health sector.

Among the dead were as many as five children, a United Nations humanitarian coordinator added.

The strikes on Houthi targets in the capital were launched after the Iran-backed rebels claimed responsibility for an armed drone attack on two oil-pumping stations in Saudi Arabia two days earlier.

Residents in Sana’a shared photos of civilians dragging the limp bodies of children out of the rubble of a residential building. They later circulated an image of a little girl, who was believed to be the sole survivor of an airstrike that hit her home.

“There was an airstrike near us, in the middle of an area packed with residents between Hael and Raqas [streets],” Abdulrazaq Mohammed said.

“The explosion was so strong that stones were flying. This is the first time our house shakes so much.”

Children suffering from acute malnutrition in Yemen Show all 17 1 /17 Children suffering from acute malnutrition in Yemen Children suffering from acute malnutrition in Yemen Doctors take some blood of Yemeni Yousef Abdullah Bakhit Ali, 13, suffering from severe acute malnutrition. With ongoing and unending conflict in Yemen, humanitarian situation continues to deteriorate across the country Unicef/Huwais Children suffering from acute malnutrition in Yemen A doctor weighs Yemeni baby Yahya Hamoud Ali Al Huzef, 9 months suffering from malnutrition Unicef/Huwais Children suffering from acute malnutrition in Yemen Ali Mohammed Ahmed Jamal,12 years old and suffering from severe acute malnutrition. He arrives with his family at a Unicef supported treatment centre in a hospital in Sanaa Unicef/Huwais Children suffering from acute malnutrition in Yemen A doctor measures the arm of Yemeni Ali Mohammed Ahmed Jamal, 12, who is suffering from malnutrition at a treatment centre in a hospital in Sanaa Unicef/Huwais Children suffering from acute malnutrition in Yemen There are over 400,000 severely malnourished children in need urgent lifesaving assistance in Yemen Unicef/Abdulhaleem Children suffering from acute malnutrition in Yemen Ali Mohammed Ahmed Jamal is weighed Unicef/Huwais Children suffering from acute malnutrition in Yemen A doctor measures the arm of baby Yahya Hamoud Ali Al Huzef Unicef/Huwais Children suffering from acute malnutrition in Yemen Unicef are currently working to reach 275,000 malnourished children with critical life-saving supplies and care for over 5 million people with safe and clean water to stop the spread of life-threatening diseases Unicef/Huwais Children suffering from acute malnutrition in Yemen Yahya Hamoud Ali Al Huzef with his family in his house in the outskirts of the capital Sanaa Unicef/Huwais Children suffering from acute malnutrition in Yemen The country is on the brink of famine and children's chances of survival are becoming slimmer by the day Unicef/Abdulhaleem Children suffering from acute malnutrition in Yemen Ali Mohammed Ahmed Jamal has his arm measured Unicef/Huwais Children suffering from acute malnutrition in Yemen Unicef are currently working to provide nearly 1 million children with vaccines and healthcare Unicef/Huwais Children suffering from acute malnutrition in Yemen Doctors take some blood of Yemeni Yousef Abdullah Bakhit Ali, 13 years old suffering from severe acute malnutrition at a treatment centre in a hospital in the capital Sanaa on November 2, 2018. (Release obtained) With ongoing and unending conflict in Yemen, humanitarian situation continues to deteriorate across the country. There are over 400,000 severely malnourished children in need urgent lifesaving assistance in Yemen. The country is on the brink of famine and childrenâ€™s chances of survival are becoming slimmer by the day. UNICEF are working with partners around-the clock to save children suffering from malnutrition and disease. We are currently working to reach: â€¢ 275,000 malnourished children with critical life-saving supplies and care â€¢ Over 5 million people with safe and clean water to stop the spread of life-threatening diseases â€¢ Nearly 1 million children with vaccines and healthcare â€¢ 9 million people with emergency cash assistance to help families buy basic commodities so they can survive Â© UNICEF/UN0253367/ Huwais Unicef/Huwais Children suffering from acute malnutrition in Yemen Unicef are working with partners around-the clock to save children suffering from malnutrition and disease Unicef/Abdulhaleem Children suffering from acute malnutrition in Yemen Unicef are currently working to provide 9 million people with emergency cash assistance to help families buy basic commodities so they can survive Unicef/Huwais Children suffering from acute malnutrition in Yemen Ali Mohammed Ahmed Jamal is suffering from malnutrition Unicef Children suffering from acute malnutrition in Yemen On 31 October 2018 in Yemen, the Al Thawra Hospital in Hodeidah where children are being treated for severe acute malnutrition. UNICEF Regional Director for Middle East and North Africa Geert Cappelaere visited Yemen from 29 October through 1 November 2018. As of 30 October 2018, over 11 million children â€“ 80 per cent of all children in the country â€“ require humanitarian assistance, due to the impact of the ongoing conflict. Worsening years of underdevelopment, attacks against civilians and civilian infrastructure and lack of salary payments for most civil servants have pushed basic services for children to the brink. Children face food shortages, disease, displacement and an acute lack of access to basic social services. One out of three children in Yemen is at risk of acute malnutrition. Â© UNICEF/UN0253574/Abdulhaleem Unicef/Abdulhaleem

Other civilians in the city said they were shaken awake by the bombings.

The Saudi-led coalition told Saudi-owned Al Arabiya TV that their alliance struck military facilities and weapons storage sites, “neutralising the ability of the Houthi militia to carry out acts of aggression”.

The coalition added: “The sorties achieved its goals with full precision,” and said it had urged civilians to avoid those targets.

Yemenis carry a body recovered in the rubble of a destroyed building following reported Saudi-led coalition airstrikes in the Yemeni capital Sana’a (Mohammed Huwais/AFP/Getty) (MOHAMMED HUWAIS/AFP/Getty Images)

In a later statement the coalition said “the possibility of an accident” had been referred to a body it had set up to investigate claims.

The Iran-backed rebels have held Sana’a since taking control of the city at the end of 2014 and forcing recognised president Abedrabbo Mansour Hadi from power.

Saudi Arabia, the UAE and its Gulf allies launched a bombing campaign in the spring of 2015 to reinstate Mr Hadi, triggering the devastating civil war.

Four years on there is little hope of an end to the fighting, which has sparked what the UN has called the world’s worst humanitarian crisis and pushed more than 13 million to the brink of famine.

A preliminary ceasefire deal was hammered out during talks held in Sweden in December, anchored on the withdrawal of all troops from the lifeline city of Hodeidah, that had become the front line of the conflict.

Under the agreement the Red Sea port, Yemen’s main channel for food and aid, would be handed over to a civil authority.

Five months on, the withdrawal tentatively has begun, with the Houthis saying last week they had unilaterally pulled out of Hodeidah and two other ports after Gulf-backed government troops refused to.

The Yemen authorities later accused the Houthis of merely handing over the port to fighters dressed in coastguard uniforms. On Wednesday, fighting erupted in the city once more between the two sides.

Talks were held in the Jordanian capital Amman the following day, but the warring sides failed to agree on how to manage revenues from Hodeidah.

Tensions reached breaking point on Tuesday after an armed drone attack on two Saudi oil-pumping stations. Saudi Arabia’s deputy defence minister accused Iran of ordering the attack.

“The terrorist acts, ordered by the regime in Tehran and carried out by the Houthis, are tightening the noose around the ongoing political efforts,” Prince Khalid bin Salman tweeted.

The Houthis later claimed responsibility and denied Iran had directed the strike. Tehran also denies providing arms to the Houthis.

“We are not agents for anyone,” Mohammed Ali al-Houthi, the head of the Houthis’ Supreme Revolutionary Committee, said.

“We make decisions independently and do not take orders for drones or anything else.”

The coalition described the drone attack as a “war crime”.