Emergency services have rushed to the River Thames in Berkshire amid reports a man is missing after going into the water.
South Central Ambulance Service (SCAS) said it was supporting Thames Valley Police (TVP), Royal Berkshire Fire and Rescue Service and Buckinghamshire Fire and Rescue Service at an incident in Cookham on Tuesday evening.
Thames Valley Air Ambulance and Hampshire and Isle of Wight Air Ambulance were also at the scene.
Thames Valley Police said it had been reported a man had gone into the river and had not been seen emerging from it.
The force retweeted a tweet from TVP Maidenhead which said: “We are on the scene in Odney Lane, in Cookham, following a report of a fear for welfare.
“It was reported that a man had entered the water.
“Officers are working to locate the man, who was not seen to get out of the water.”
Pictures from the scene appear to show rescue workers in boats on the river.
The incident appears to have taken place close to The Ferry pub.
SCAS earlier said in a tweet: “Reports of three boys having drowned in this incident are not correct.”
The service said on Twitter that further updates will come from Thames Valley Police.
The police force did not respond to requests for more information about the incident.