Five people were killed and seven more injured after being hit by a truck in Bilaspur area of Gurgaon in the early hours of Sunday, police said.
The accident took place on the Kundli-Manesar-Palwal (KMP) Expressway near Manesar, they said.
The deceased include a woman and a child, Bilaspur SHO Inspector Jai Prakash told PTI over the phone.
The official said the victims were yet to be identified.
"Further investigations were underway," he said.