Trains are set to resume operations on Tuesday.

A tentative agreement has been reached to end New Jersey's first statewide transit strike in more than 40 years, according to the union representing the engineers and train operators.

Trains are set to resume operations on Tuesday, according to NJ Transit. The union had previously indicated trains would resume on Monday.

"We will have a deal. Strike will end," the Brotherhood of Locomotive Engineers and Trainmen (BLET) said in a statement.

The strike, which lasted just three days, shut down trains on Friday, leaving some 350,000 commuters scrambling to find other modes of transportation.

BLET members had been threatening to go on strike unless NJ Transit officials and the union were able to agree on new contract terms and conditions for the workers who drive the trains.

The day before the strike commenced, a deal with the union was close but not reached, New Jersey Gov. Phil Murphy said at the time.

Both sides met for eleventh-hour negotiations to avert the strike on Thursday, in addition to a meeting in Washington, D.C., on Monday with the National Mediation Board, but no resolution was reached.

Union leaders said during a press conference on May 9 that it's been five years since train engineers working for NJ Transit have received a pay increase.

"Reasonable people would vote for an agreement that is fair," BLET National President Mark Wallace said at the time.

Tom Haas, the general chairman for BLET, said during the same news conference that engineers working for NJ Transit earn an average salary of $113,000 a year. If NJ Transit CEO Kris Kolluri agrees to an average salary of $170,000 a year for engineer operators, then "we got a deal," Haas said.

The details of the tentative agreement reached on Sunday have not yet been released.

This is a developing story. Please check back for updates.