BEIRUT 鈥 Lebanese rescue workers dug through the rubble looking for survivors of a powerful warehouse explosion that shook the capital Beirut, killing 78 people and injuring nearly 4,000 in a toll that officials expected to rise.

Tuesday鈥檚 blast at port warehouses storing highly explosive material was the most powerful in years in Beirut, already reeling from an economic crisis and a surge in coronavirus infections.

President Michel Aoun said that 2,750 tonnes of ammonium nitrate, used in fertilizers and bombs, had been stored for six years at the port without safety measures, and he said that was 鈥渦nacceptable鈥.

He called for an emergency cabinet meeting on Wednesday.

Officials did not say what caused the blaze that set off the blast. A security source and local media said it was started by welding work being carried out on a hole in the warehouse.

鈥淲hat we are witnessing is a huge catastrophe,鈥 the head of Lebanon鈥檚 Red Cross George Kettani told broadcaster Mayadeen. 鈥淭here are victims and casualties everywhere.鈥

Hours after the blast, which struck shortly after 6 p.m. (1500 GMT), a fire still blazed in the port district, casting an orange glow across the night sky as helicopters hovered and ambulance sirens sounded across the capital.

The blast revived memories of a 1975鈥90 civil war and its aftermath, when Lebanese endured heavy shelling, car bombings and Israeli air raids. Some residents thought an earthquake had struck.

Dazed, weeping and injured people walked through streets searching for relatives.

鈥淭he blast blew me off metres away. I was in a daze and was all covered in blood. It brought back the vision of another explosion I witnessed against the US embassy in 1983,鈥 said Huda Baroudi, a Beirut designer.

Prime Minister Hassan Diab promised there would be accountability for the deadly blast at the 鈥渄angerous warehouse鈥, adding 鈥渢hose responsible will pay the price.鈥

The US embassy in Beirut warned residents about reports of toxic gases released by the blast, urging people to stay indoors and wear masks if available.

MANY MISSING

鈥淭here are many people missing. People are asking the emergency department about their loved ones and it is difficult to search at night because there is no electricity,鈥 Health Minister Hamad Hasan told Reuters.

Hasan said 78 people were killed and nearly 4,000 injured.

Footage of the explosion shared by residents on social media showed a column of smoke rising from the port, followed by an enormous blast, sending a white cloud and a fireball into the sky. Those filming the incident from high buildings 2 kilometers from the port were thrown backwards by the shock.

Bleeding people were seen running and shouting for help in clouds of smoke and dust in streets littered with damaged buildings, flying debris, and wrecked cars and furniture.

The explosion occurred three days before a UN-backed court is due to deliver a verdict in the trial of four suspects from the Shi鈥檌te Muslim group Hezbollah over a 2005 bombing which killed former Prime Minister Rafik al-Hariri and 21 others.

Hariri was killed by a huge truck bomb on the same waterfront, about 2 kilometers from the port.

Israeli officials said Israel, which has fought several wars with Lebanon, had nothing to do with Tuesday鈥檚 blast and said their country was ready to give humanitarian and medical assistance. Shi鈥檌te Iran, the main backer of Hezbollah, also offered support, as did Tehran鈥檚 regional rival Saudi Arabia, a leading Sunni power.

At a White House briefing, US President Donald Trump indicated that the explosion was a possible attack, but two US officials, speaking on condition of anonymity, said initial information contradicted Mr. Trump鈥檚 view. 鈥 Reuters