BOSTON -- Two men who jumped from the Tobin Bridge Saturday evening in what Massachusetts State Police called a "shared suicide bid" are expected to survive.

A 35-year-old Revere man and a 31-year-old man from Bedford, N.H., jumped 115 feet from the upper deck of the bridge to the Mystic River below, police said. Both remain hospitalized in critical condition.

“The motivation and execution remain under investigation but the evidence thus far, specifically a note that was recovered from the car, points to suicide,” said Jake Wark, spokesman for Suffolk District Attorney Daniel Conley.

Passers-by on the bridge saw the two men jump and called police just before 5:30 p.m. The men were pulled out of the water by officers on a state police boat and taken to Massachusetts General Hospital.

A car, which police said belong to a relative of the New Hampshire man, was found on the upper deck of the bridge.

The design and weight of the Tobin Bridge makes it impossible to construct the same kind of suicide-prevention barricades found on the Bourne and Sagamore bridges, Roberta Hurtig, executive director of the Samaritans of Boston, told the Boston Herald.

“At one time, people died once or twice a month by jumping off the bridge,” Hurtig said. “From what I know, the Tobin Bridge authorities now train all of their employees to monitor surveillance cameras and to look out for cars that have stopped.”

Police did not release the names of the two men.