GENOA, Italy, August 18, 2018 (News Wires) - Rescuers scoured the wreckage of Italy's bridge collapse on Wednesday as the death toll climbed to 37 and the government blamed the bridge's private owner, demanding resignations and moving to strip its toll concession. The 50-year-old bridge, part of a toll motorway linking the port city of Genoa with southern France, collapsed during torrential rain on Tuesday, sending dozens of vehicles crashing onto a riverbed, a railway and two warehouses. As cranes moved in to shift truck-sized chunks of broken concrete, hundreds of firefighters searched for survivors, while public shock and grief turned to anger over the state of the 1.2 km-long bridge, completed in 1967 and overhauled two years ago. The condition of the bridge, and its ability to sustain large increases in both the intensity and weight of traffic over the years, have been a focus of public debate since Tuesday's collapse, when an 80-meter span gave way at lunchtime as cars packed with holidaymakers as well as trucks streamed across it. Deputy Prime Minister and Interior Minister Matteo Salvini said the private sector manager of the bridge had earned "billions" from tolls but "did not spend the money they were supposed to" and its concession should be revoked. He was apparently referring to the bridge's concession-holder, Italian motorway firm Autostrade, a unit of Atlantia group. "Imposing the highest penalties possible and making sure that those responsible for the dead and the injured pay up for any damages and crimes is the very least," he said. Fire brigade spokesman Luca Cari said 400 firefighters were at the site, lifting big chunks of concrete to create spaces for rescue teams to check for survivors. Italy's transport minister said on Wednesday he had begun a process to strip Autostrade of its concession and he demanded top Autostrade managers resign.