NARRAGANSETT — Rescue workers in this seaside town were called to the water twice Sunday afternoon for unrelated incidents that left two men dead.

The first call came in at about 1:15 p.m., when people on the rocks at the end of Hazard Avenue noticed two divers in distress.

Police Lt. William McGovern said Evan Davidson, 43, of Brewster, Mass., had lost one of his fins after entering the water and had tried to retrieve it.

“Something happened when he was in the water” and then his friend tried to help by pulling him out, McGovern said.

Davidson, described as an experienced diver, was taken to South County Hospital, where he was pronounced dead, McGovern said.

The second call came in at 2:48 p.m., when a man collapsed after being helped from the water by a surfer.

Americo DiPetrillo, 53, of Coventry, was in the water north of the Town Beach, between the Dunes Club and the mouth of the Narrow River, McGovern said.

The surfer saw DiPetrillo struggling and helped him to shore, where he collapsed. Lifeguards and bystanders performed CPR.

DiPetrillo was taken to South County Hospital, where he was pronounced dead, McGovern said.

The state medical examiner’s office is performing autopsies in both cases. Results were not available yesterday, an office spokeswoman said.

Narragansett police responded to a third call involving a death yesterday at 6:24 a.m., when a woman walking her dog reported an unresponsive woman behind the Atlantic House hotel, on the corner of Ocean Road and Central Street, McGovern said.

The woman, 51, from Bellingham, Mass., had been staying at the hotel with her husband. Her body was taken to the medical examiner’s office for an autopsy.

The police “do not suspect foul play,” McGovern said.

“It looked like she might have been sitting on the curb in the parking lot,” he said.

The police did not release the woman’s name, saying they did not know if all family members had been notified.

redgar@projo.com