The child, wrapped in a plastic bag, was spotted in a wounded condition by a passerby of a nearby locality. She then informed the police, who admitted the infant to civil hospital, they said.
Civil surgeon Dr Vinod Gupta said the child was brought in a serious condition and had sustained a serious injury on his body.
A dog or some other animal might have bitten him as there was bleeding from his wound, he said.
The new-born was later shifted referred to PGIMER in Chandigarh.