A woman's body was recovered from the River Thames in the early hours of Bank Holiday Monday, police say.
The discovery was made in the stretch of the water at Maidenhead, Berkshire.
Thames Valley Police said officers are at Boulters Lock after a report of a woman's body in the river at 7.15am.
The force said the death is being treated as unexplained and formal identification has yet to take place.
Officers are working to establish the circumstances and to identify the woman's next of kin.
Boulters Lock and Cookham Lock were both closed on Monday afternoon, and police were asking members of the public avoid the area.
Thames Valley Police in Maidenhead tweeted: "Officers are present in Boulters Lock, Maidenhead after a report of a woman’s body in the river at 7.15am today.
“The body was recovered from the water. Formal ID is yet to be established.
"The death is currently being treated as unexplained and officers are working to establish the circumstances, and also identify a next of kin.
"Boulters Lock and Cookham Lock are both closed at this time, and a scene watch is in place.
"We would politely ask that members of the public avoid the area."
Anyone with any information is asked to call 101, or report online, quoting reference 359 of 31/5.
