Photo: The Canadian Press

The mother of the man accused of driving down and killing a Muslim family in London, Ont., says she is "grieved by the horrific tragedy."

Alysia Bisset says she is praying for the victims and their family members.

Her son, Nathaniel Veltman, faces four counts of first-degree murder and one count of attempted murder.

Relatives have identified the dead as 46-year-old Salman Afzaal, his 44-year-old wife Madiha Salman, their 15-year-old daughter Yumna Salman and her 74-year-old grandmother, Talat Afzaal.

The couple's nine-year-old son, Fayez, was seriously wounded but is expected to recover.

Police have alleged the family was attacked because they were Muslim.

Veltman's father has called the attack a senseless act and an "unspeakable crime."