Police say they have one suspect in custody and are searching for three more people who ran off.
Police say the incident appeared to start on Route 20 and ended up in the Paterson residential neighborhood.
The incident happened near 28th Street and Ninth Avenue while the officer was in his patrol car.
The shooting happened on the block where Rep. Bill Pascrell lives. He tweeted it was "feet from our door."
Several unmarked trooper cars were riddled with bullet holes.
Paterson Mayor Andre Sayegh said the wounded trooper had surgery and is expected to survive.
Officers with long guns were searching a nearby wooded area, and even had their K-9s sniff through a Burger King.
"My office and the entire New Jersey State Police family is keeping our trooper and his family in our thoughts and prayers as he receives treatment for his injuries today and we will continue to support them through his
recovery," according to a statement from the New Jersey Attorney General.
Governor Phil Murphy has been following the events that led to the shooting and reached out to the injured state trooper.
The head of the state police has been at the hospital since early this morning and said the trooper is surrounded by his family.
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