Rescuers were on Sunday searching for victims in the rubble of a funeral hall in Yemen's rebel-controlled capital Sana’a where the United Nations said at least 140 people were killed in an airstrike.
Smoke was still billowing from the site in southern Sana’a as dozens of civilians were standing nearby waiting for a word on missing relatives.
More than 500 people were injured in Saturday's attack, the UN said.
Witnesses said that multiple airstrikes had targeted the hall.
“I was praying in the Nour al-Salam Mosque, which is a few metres from the hall when I heard the sound of a violent airstrike,” Abdul karim Dukhaish, a witness, told dpa.
“I ran to my house near the hall fearing for my family. When I was on my way, a second strike came and hit the hall again.”
Other witnesses said that there were more than 1,000 mourners inside the hall at the time of the attack.
They were there attending a funeral ceremony for the late father of pro-rebel Interior Minister Galal al-Rawishan, who survived the attack unharmed.
The Iran-allied rebels blamed the attack on a Saudi-led air alliance.
The coalition denied responsibility, saying it will investigate the incident.
The attack is believed to be one of the deadliest in the impoverished country since Saudi Arabia and fellow Sunni allies started an air campaign against mostly Shiite rebels in Yemen in March 2015.
The United States said Saturday it would begin an "immediate review" of its support for the Saudi-led coalition in Yemen following the attack.