Authorities are examining the reasons why a motorway collapsed in the US State of Philadelphia on Sunday after a vehicle caught fire.
While the blaze was reported to be under control an elevated section of Interstate 95 broke away closing the main north-south highway on the East Coast, threatening to upend travel in parts of the densely populated Northeast.
Officials said the tanker was carrying a petroleum product, possibly hundreds of gallons of gasoline.
There were no immediate reports of injuries.
Officials were also concerned about the environmental effects of runoff into the nearby Delaware River.
