© Khaled Abdullah / Reuters



many of whom were armed, took to the streets of Yemen's capital, Sanaa, toand call for an investigation. Demonstrators at a massive rally called thegathered outside thein Sanaa.Some of the protesters chanted "Allahu Akbar! America is the Great Satan!" while reportedly also shouting death threats directed at Saudi Arabia's rulers, according to AFP. The demonstration came a day after an airstrike reportedly targeted a funeral service in the Yemeni capital,. In a statement cited by Saudi Press Agency, the Saudi-led coalition denied any role in the incident and vowed to carry out an internal investigation."After this massacre, we are more determined to confront the assailants," prominent rebel leader Mohammed Ali al-Huthi told the crowd, as quoted by AFP. "Open the fronts with the Saudi enemy immediately."People rushed to help, to take the wounded to hospital, andA man who attacks people aiding the wounded hasThere were so many people. It's the biggest square in Sanaa, and it was full of people," a witness of the deadly attack told RT Arabic.Though the airstrike is said to be the deadliest attack on non-combatants in the months-long Saudi-led operation against Houthi rebels, it is not the first time Yemeni civilians have been targeted.One of the deadliest attacks to date took place when the coalition's aircraft attacked a crowded marketplace in the northern Yemeni village of Mastaba in April. UNICEF put the death toll from that bombing airstrike at 119, including 22 children.In August, at least 11 people were killed and 19 injured in an airstrike that hit a hospital in northwestern Hajjah province, according to Doctors Without Borders (MSF).Earlier in the month, at least 10 children were killed and nearly 30 injured in a school in northwest Yemen, MSF reported. That strike was also blamed on the Saudi-led coalition.The devastating funeral bombing has forced the US, Saudi Arabia's main arms supplier, to announce an "immediate"review of Washington's support for the kingdom.Ned Price said on Sunday that a"We have initiated an immediate review of our alreadyand are prepared to adjust our support so as to better align with US principles, values and interests, including achieving an immediate and durable end to Yemen's tragic conflict," the statement said.Tensions in Yemen spiraled out of control after President Ali Abdullah Saleh was deposed in 2012. In response, his Houthi supporters seized the capital city of Sanaa in 2014, before advancing to the south and seizing large parts of Yemen, forcing current Sunni President Abd-Rabbu Mansour Hadi to flee to Riyadh, where he requested help in being restored to power.Saudi Arabia began its intervention in March of 2015 and is playing the biggest role in carrying out airstrikes on the rebels, with its Sunni Arab allies supporting the effort. Some Western nations, including the US, the UK, and France, have been contributing intelligence and weapons to the Saudi campaign.International rights groups accuse the Saudi forces of carrying out indiscriminate attacks on civilian targets in Yemen, which amount to war crimes in the view of some. Riyadh denies the allegations, saying it has procedures in place to reduce the number of civilian casualties.