MONTREAL — A childhood friend of the Quebec man killed in a Florida boat explosion Monday said one of the victim’s sisters was among the other six passengers injured in the blast.

Thi Cam Nhung Le said 41-year-old Sebastien Gauthier was celebrating the holidays with his family when the explosion occurred in Fort Lauderdale. Le said Gauthier’s older sister was also on the boat when it erupted into flames, and she was taken to a hospital.