Authorities in Harbin, Heilongjiang province, have denied construction officials' claims that it is not possible to find contractors who might bear responsibility for Friday's bridge collapse that killed three and injured five.

The ramp of the $300 million Yangmingtan Bridge, in use for less than a year, tilted to one side and crashed onto the pavement 30 meters below early on Friday, taking four trucks with it.

Feng Licheng, 41, one of the people injured, is still in critical condition, said Jiang, a publicity officer who did not give her full name, at Harbin No 1 Hospital in the Heilongjiang provincial capital.