At least six civilians, including women and children, were killed and dozens injured in coalition-led air raids on residential and military Houthi areas in Yemen's capital, Sana'a, led by Saudi Arabians.
The coalition carried out 11 attacks In total, the Houthi-led Masirah television station reported on the capital of a total of 19 rebels. It accused "aircraft of [Saudi-led] aggression".
The air strikes took place two days after the Iranian-oriented rebels claimed drone strikes temporarily blocking an important oil pipeline in neighboring Saudi Arabia, surrounded by mud houses, a local Reuters journalist said. A crowd of men lifted the body of a woman wrapped in a white shroud in an ambulance.
Analysis: Saudi says oil stations have been attacked by Houthi drones.
Saudi Arabian broadcaster Al Arabiya quoted a coalition statement as launching an operation aimed at "neutralizing the Houthi militia's ability to carry out aggression."
"The missions reached their targets with full precision," it said, warning civilians to circumvent these goals.
Masirah quoted the Houthi Ministry of Health as saying six civilians, including four children, were killed and 52 wounded, including two Russian women working in the health sector.
A witness told AFP News Agency that raids began around 8:00 am (GMT).
Afrah Nasser, a Yemeni journalist, said her family's home in Sana'a was near an airstrike. She accused the Saudi Arabian Alliance of targeting civilians.
"I know the road, there are no military targets, there is no excuse for the coalition led by Saudi Arabia – it was a deliberate and systematic attack on civilians," Nasser told Al Jazeera.
Nasser Arrabyee, another Yemeni journalist, said the number of victims is expected to increase.
"Medical sources say they have received many victims – wounded and dead – which means the number will be even higher than just six," he told Al Jazeera of Sana'a.
"Residential areas in the middle of Sana'a, in the most densely populated areas, were randomly bombed and many houses were knocked down."
Calls for Vengeance  On Tuesday, the Houthi rebels took over responsibility for dual drone attacks on Saudi Arabia's main east-west oil pipeline. They said they were a response to "crimes" committed by Riyadh since March 2015 during the bloody air strike in Yemen.  Saudi Arabia's deputy defense minister accused Iran on Thursday of ordering the drone strikes on two Aramco pumping stations as a "tool to implement its expansionist agenda in the region."
"The terrorist acts ordered by the Tehran regime and carried out by the Houthis are exacerbating the no-holds-barred political effort," said Prince Khalid bin Salman on Twitter.
] Houthis Supreme Revolutionary Chiefs chief denied that Iran had led the strike and said the movement was making its drones locally. Tehran also denies providing the Houthis weapons.
"We are not agents for anyone," said Mohammed Ali al-Houthi. "We make decisions independently and do not accept orders for drones or other things."
The Saudi Pipeline, which can carry five million barrels of crude a day, provides a strategic alternative to Saudi Arabian exports if the shipping route from the Gulf through the Strait of Hormuz is closed.
Iran has repeatedly threatened to close the vital line for global oil supply in the event of a military confrontation with the United States.
The Saudi Cabinet called on Wednesday for the "confrontation of terrorists carrying out sabotage, including Iran-backed Houthi militias in Yemen."
Important Allies of the United Arab Emirates (UAE) reiterated the call.
"We will reciprocate and return the favor" It's hard for us to see Houthis hit civilian targets like what happened in Saudi Arabia, "said UAE Foreign Minister Anwar Gargash. on Wednesday.
Al Jazeera and news agencies