Reckless thrillseekers have been spotted diving off a promenade - risking the chance of fatally landing on unseen rocks.

The group were jumping into the high tide at Dover Harbour this afternoon.

The Coastguard and district council have previously warned against its potentially fatal dangers, but with today's hot weather, people are risking it to cool off.

An eyewitness said: "It's so dangerous - there are boulders at the bottom that you can hardly see.

"If they hit one, it could paralyse them instantly.

"The tide is at its highest and, as the water reaches the sea wall, people are jumping into the sea.

"I saw one person dive head first."

"It's so dangerous - there are boulders at the bottom that you can hardly see..."

It is understood there are a number of signs in the area warning people not to jump from in to the sea.

Recently the Coastguard issued a statement calling on divers to take care.

A spokesman said: "We always urge people to have fun but stay safe when out enjoying our beautiful beaches and coastlines.

"Jumping from piers, cliffs, rocks or other structures into the sea can be very dangerous.

"The depth of the water can dramatically change with the tide, and what was a deep pool at lunchtime might be a shallow puddle by teatime.

"You don’t know what hazards may be lurking under the surface until you are hurt or worse.

"The shock of cold water may make it difficult to swim to safety and strong currents can quickly sweep people away."

Read more: All the latest news from Dover