Negligence probed in deadly Beirut blast amid public anger

A survivor is taken out of the rubble after a massive explosion in Beirut, Lebanon, Wednesday, Aug. 5, 2020. The explosion on Tuesday flattened much of a port and damaged buildings across Beirut, sending a giant mushroom cloud into the sky. In addition to those who died, more than 3,000 other people were injured, with bodies buried in the rubble, officials said.(AP Photo/Hassan Ammar)

An army helicopter drops water at the scene of Tuesday's massive explosion that hit the seaport of Beirut, Lebanon, Wednesday, Aug. 5, 2020. Residents of Beirut awoke to a scene of utter devastation on Wednesday, a day after a massive explosion at the port sent shock waves across the Lebanese capital, killing dozens of people and wounding thousands. (AP Photo/Hussein Malla)

Lebanese soldiers search for survivors after a massive explosion in Beirut, Lebanon, Wednesday, Aug. 5, 2020. The explosion flattened much of a port and damaged buildings across Beirut, sending a giant mushroom cloud into the sky. In addition to those who died, more than 3,000 other people were injured, with bodies buried in the rubble, officials said.(AP Photo/Hassan Ammar)

A drone picture shows the scene of an explosion at the seaport of Beirut, Lebanon, Wednesday, Aug. 5, 2020. A massive explosion rocked Beirut on Tuesday, flattening much of the city's port, damaging buildings across the capital and sending a giant mushroom cloud into the sky. More than 70 people were killed and 3,000 injured, with bodies buried in the rubble, officials said. (AP Photo/Hussein Malla)

A survivor is taken out of the rubble after a massive explosion in Beirut, Lebanon, Wednesday, Aug. 5, 2020. The explosion flattened much of a port and damaged buildings across Beirut, sending a giant mushroom cloud into the sky. In addition to those who died, more than 3,000 other people were injured, with bodies buried in the rubble, officials said.(AP Photo/Hassan Ammar)

BEIRUT — Investigators probing the deadly blast that ripped across Beirut focused Wednesday on possible negligence in the storage of tons of a highly explosive fertilizer in a waterfront warehouse, while the government ordered the house arrest of several port officials.