Israeli rescuers pulled two more bodies from the rubble of a collapsed Tel Aviv building site Tuesday, bringing the death toll to four as searches continued, the army said.
"Rescue forces have extracted an additional body," an army statement said, with three more construction workers still believed to be missing.
Police spokesman Micky Rosenfeld told AFP that "500 police rescuers, army and firefighters are hard at work trying to find the missing."
"There is no time limit for searches that are concentrated in four areas of the site," he added.
He said an investigation had been opened to determine responsibility for Monday's accident, but had no details yet.
Prime Minister Benjamin Netanyahu visited the site Monday night to inspect the search operations.
"There are still people trapped; we are making every effort and are not giving up on anyone. We will reach them all," he said in a statement.
The circumstances of the collapse, which occurred in the Tel Aviv's Ramat Hahayal high-tech neighbourhood, remain unclear.
Israeli media reported the accident occurred when a floor collapsed during the construction of a four-storey underground parking, with a shopping centre eventually planned to be built on top.
The Yedioth Ahronoth newspaper recalled an article from three years ago in which the leader of the Danya Cebus company which built the car park allegedly said they had decided not to use a construction engineer to supervise the work, instead making do with an architect.
The Maariv daily denounced what it described as safety failings at construction sites, saying 230 people had been killed on them in Israel in the past five years.
Israel has seen a high number of construction accidents in comparison to the developed world.
Haaretz newspaper reported in May that 480 people were killed in construction accidents between 2000 and 2015, citing a survey placing Israel third from the bottom in a list that included the United States and 20 European nations.
Police reported 28 people have been killed on construction sites since the beginning of 2016.