One of the officers was left with a fractured wrist, which will require surgery while the other suffered severe head injuries. He remains in hospital in a stable condition, and his injuries are not thought to be life-threatening, Greater Manchester Police said.
More top news
Storm Doris arrives in the north west. Find out the latest here
Strong winds are causing travel disruption on Merseyside as Storm Doris hits the region.
There is "room for improvement" in rail safety despite it being 10 years since the last passenger death in a train crash.