BOSTON (WHDH) - Passengers taking a duck boat tour of Boston called police Monday morning after spotting a dead body in the Charles River, officials said.

State police received a 911 call about 11 a.m. after the captain of a duck boat tour noticed a body floating in the area of the Longfellow Bridge.

A State Police Marine Unit responded to the scene and pulled the body of a 59-year-old Boston man from the water.

Warren Dawson and Jillian Casey, both of whom are visiting the city from Britain, were on the boat when passengers pointed out the body.

“Everybody looked and we could see a head sticking out above the water,” Dawson said.

Although the duck boat continued its tour after police arrived, Casey says everyone’s mood changed drastically.

“Very subdued afterward,” she said. “To be honest, I would have rather got off. It wasn’t great.”

The man, whose name has not been released, had previously been reported missing, according to a spokesman for the Suffolk District Attorney’s Office.

The Office of the Chief Medical Examiner will determine the cause and manner of his death.

Foul play is not suspected.

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