The bodies of three men, ages 18-20, and a 17-year-old girl were recovered from their vehicle in the Tracadie River in New Brunswick, the Canadian Broadcasting Corp. reported. The crash occurred about 1 a.m.
A relative told the news network the four had been out celebrating one of their birthdays.
The Royal Canadian Mounted police said the car was driving up a hill when it slid off the icy road and into the river in the backwoods near Tracadie-Sheila on the Acadian Peninsula.
The names of the victims were being withheld pending notification of relatives.