A prosecutor in Dubai says high speed and drinking were involved in a Ferrari crash that killed a Toronto boxer, his cousin, a survivor of the 2013 Boston Marathon bombing and her university roommate.

Salah Bu Farousha, the head of Dubai Traffic Public Prosecution, said Wednesday that an investigation continued into the crash that took place early Sunday near Dubai's Jumeirah Lake Towers neighbourhood.

However, he said all those killed in the crash of the two-seat yellow Ferrari had been drinking.

James Portuondo Dubai Ferrari crash victim

James Portuondo, 27, was one of two Toronto-area men who died last weekend when the Ferrari they were riding in crashed in Dubai. (Submitted)

Farousha declined to name those killed. But officials in Dubai who spoke on condition of anonymity identified those killed as Canadian boxer Cody Nixon, 24, and his cousin, James Portuondo, 27.

Boston bombing survivor Victoria McGrath and her Northeastern University roommate, Priscilla Perez Torres, were also identified as victims of the crash.

Farousha had earlier been quoted as saying Portuondo, McGrath and Torres died at the scene where the two-seater sports car crashed into a lamppost, while Nixon died later in hospital.