Police say a pair of women accused of stealing two cars and fistfuls of narcotics led them on a Thelma-and-Louise-like chase through Oakville and Burlington Sunday morning before officers tackled them outside a coffee shop.

"I'm not sure of the nature of (their) association," said Det. Steve Metelsky. "But obviously they worked together."

The chain of events began at 10:30 a.m. in a Metro grocery store in Oakville, near Eighth Line and Upper Middle Rd. Witnesses at the store said Tylenol and OxyContin were stolen from the pharmacy before two women hopped into a stolen car from Caledon and fled.

From there, police say, the women tore through Oakville and headed to Burlington, covering 20 kilometres in 20 minutes –"a good stretch of geographic territory," Metelsky said.

The women were next spotted at a Petro Canada in Burlington on Guelph Line, near New St., where a woman was assaulted and had her Mazda snatched. The Mazda driver was left with minor head injuries.

Another car was hit as the pair fled the gas station. Witnesses watched the woman in the driver's seat put the car into gear and the other woman lean over from the passenger's seat to stomp on the gas pedal.

Police say the two took off back to Oakville.

Police chased the stolen Mazda along Highway 407 at speeds near 160 km/h. The car left the highway and was abandoned at Ford Dr. and Royal Windsor Dr.

Police say the two women hopped out of the car and tried to run, but officers took them down near a Tim Hortons at the intersection.

A witness said one of the women had seizures after she was arrested.

"I can't give a professional opinion on what (drug) they were on," Metelsky said.

"But their behaviour was impaired."

Two women, whose names have not been released, have been charged with theft over $5,000, possession of property obtained by crime, robbery, dangerous operation of a motor vehicle causing bodily harm and fleeing police.

The investigation is continuing as police try to sort out all of the suspects' stops to determine if any other crimes were committed.

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