(QMI Agency)

Eight horses broke loose from an Ontario farm Thursday, stampeded into traffic, galloped over a local woman's vehicle and smashed into a cop car.

Two of the horses died after colliding with the woman's vehicle, and another is gravely injured and may have to be put down.

It all started Thursday, near midnight, when the eight horses broke loose in Milton, Ont., located west of Toronto.

"A citizen observed the horse stampede approaching her vehicle and she pulled over to the side of the roadway. The galloping horses ran into her vehicle," Halton Regional Police said in a statement.

Cops tried to block the road, but the horses — frightened by car lights and the sound of a nearby train — kept running around frantically.

"The horses then stampeded towards the parked police vehicle. One horse leapt over the front of the vehicle and made contact. A second horse jumped over the rear of the police vehicle and came crashing into the back window and trunk area."

While both vehicles were badly damaged, neither the cop nor the woman were hurt.

"After a considerable amount of effort, the five remaining horses were rounded up by a number of uniform and tactical police officers. The remaining horses were taken back to their farm by their owners who live nearby," police said.

The whole debacle lasted for several hours.

"It was not known at the time of the event as to how the horses were able to escape their fenced compound on the farm," police said.