Two grandparents and their infant grandchild were killed on a busy stretch of Highway 401 on Monday night after a van being chased by police east of Toronto crashed while going the wrong way, causing a multi-vehicle collision.

In addition to the first-degree murder charge, Karabas is also charged with second-degree murder, driving under the influence, and fleeing a police officer.

SIU investigating multi-vehicle collision on Hwy 401 in Whitby last night that resulted in the deaths of four individuals, including an infant. SIU spokesperson en route to Henry St overpass.

Two grandparents and their infant grandchild were among four people killed in a fiery crash east of Toronto on Monday after police pursued a liquor store robbery suspect driving the wrong way on Highway 401,

Four people are dead, including an infant and two grandparents, following a high-speed police chase going the wrong way on Highway 401 outside of Toronto. Witness video of the chase

Durham police say an alleged robbery suspect caused a multi-vehicle collision that led to "fatalities" on Highway 401 in Whitby on Monday after the person allegedly drove onto the road in the wrong direction.

Police say a pursuit that began with a call about a robbery in a community northeast of Toronto has ended with a deadly crash. Durham Regional Police say in a social media post late Monday that officers were called to a robbery in Clarington.