Two Windsor children have died in a massive crash on a Detroit freeway.

The children were seven and nine years old.

One adult from a different vehicle is also dead. Police say 12 other people were hurt in the crash involving about 30 vehicles on Interstate 75.

“It is a very fluid situation,” says Michigan State Police Lt. Michael Shaw. “Two of the people that went to hospital were in critical condition and that could end up being fatalities as well."

A bulldozer was used to peel vehicles apart so they could be loaded onto flatbeds.

About 150 other vehicles were stuck in between the crashes. The I-75 looked like a sea of flashing emergency lights, carefully weaved between dozens of mangled vehicles.

Shaw says the deaths and injuries occurred in a chain-reaction crash around 9 a.m. Thursday morning on a mile-long stretch of I-75 on the southwest side of the city, between Springwells and Dearborn.

It happened during wintry conditions caused by lake effect snow blowing right across the state from Lake Michigan.

A carefully conducted response and clean-up involved Michigan State Police, multiple EMS services, Detroit fire, Detroit police, the Wayne County sheriff’s office and Taylor police.

“We've had accidents on 94 that have gone up to a hundred cars, but this is one of the worst I've seen in the Detroit area,”says Shaw.

Police are still investigating the cause of the accident, but believe white-out conditions played a major role.