Thrill-seeking youngsters have been warned after breaking into a quarry to go swimming in its freezing deep water lakes.

Police said youths have repeatedly damaged fencing at the Cemex quarry in Rochester Road, Aylesford, to get in.

According to officers, the site is also being used off road cycles on the rough terrain.

Since the start of May police have received five reports of criminal damage or theft of padlocks at the site.

They attribute the trend to the onset of warm, light evenings and admit the lakes are an attractive proposition on a summer's day.

PC Becky Ballard said: "Cemex’s site is not a summer playground.

"It’s dangerous and parents shouldn’t let their children play or swim there."

But she added: "I can understand why you’d want to be there, because on a summer’s day it looks beautiful and the water is very inviting.

"But this isn’t a country park, it’s an industrial site, anyone going there is trespassing and putting themselves in danger."

Police are stepping up patrols and working with Cemex to improve security, but say they cannot be there all the time.