Three people have been pulled from the water at a popular beach, coastguards said.
Emergency teams were called to reports that the three needed urgent medical aid at Camber Sands, near Rye, East Sussex, at about 2.15pm, the Maritime and Coastguard Agency (MCA) said.
The Lydd and Lee-on-Solent-based UK Coastguard search-and-rescue helicopters were also scrambled to the scene, along with an air ambulance. An RNLI lifeboat from Rye and Coastguard rescue teams are also there.
The conditions of the three people are unclear. An MCA spokesman said: "This incident is ongoing and we have no further information at this stage."
A Sussex Police spokesman said: "Three people have been pulled from the sea at Camber Sands on Wednesday (August 24).
"One man was rescued at around 2.10pm and at around 2.20pm another person was seen in the water and was also rescued. A third person was rescued at 2.35pm. All three are being treated at the scene."
It is the second serious incident to take place recently at Camber Sands, which with its sand dunes has long been a popular destination for beachgoers.
Last month, 19-year-old Brazilian Gustavo Silva Da Cruz died after getting into difficulty while swimming in the sea there.
Mr Da Cruz, who was visiting family in Croydon, south London, was one of three men who got into trouble. The two others, who were not connected to him, included a man aged 35 and his son aged 17.
A South East Coast Ambulance spokesman confirmed paramedics were at the scene, near the central car park, dealing with three patients pulled from the sea.
He said: "They are receiving treatment but we don't have further details at the moment."