The pick-up van was carrying 21 people.
The victims were returning from Haridwar when the accident occurred near Dhakwala Gujran village in Karnal, SHO of Police Station Sadar in Karnal district, Inspector Manoj Kumar said over phone.
While one person succumbed at the accident spot, six others died at the Kalpana Chawla Medical College in Karnal.
"All the injured were taken to Kalpana Chawla Medical College, out of which two seriously injured were rushed to PGIMER at Chandigarh," he said.
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