UPDATE, Friday, 5:42 p.m. — Police say foul play is not suspected in the woman's death.
UPDATE, Friday 11:45 a.m.: Photos from the scene as discovery of the body disrupted morning routines around the Pond.
An eyewitess, who walks every morning with his friends, told Jamaica Plain Patch they were the ones who found the body . Rueben (of Roslindale) said they found a blonde woman face down in the water. At first, he said, he thought it was a mannequin. When they realized it wasn't, they stopped another person at the pond who had a cell phone and called police.
Boston police have been on the scene all morning.
Jamaica Plain Patch will bring you more information as it becomes available.
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[Editor's note: I've removed a reference to police boats after visiting the scene and not finding any in use.]