Police have issued a warning to parents and teachers after children from three high schools were caught trespassing and swimming in a quarry.

Officers in Chorley were called to Hill Top Quarry in Whittle-le-Woods on Monday afternoon where they stopped youngsters from Balshaws High School, St Michael's High School and Parklands High School.

The police say they will now be contacting parents and the individual schools in relation to the trespassing and warning them about the hidden dangers associated with quarries.

A spokesperson for the police said: "We have just attended Hill Top Quarry in Whittle-le-Woods due to reports of children trespassing and possibly swimming at that location.

"Do you know where your children are?

"We have stopped a number of children from Balshaws, St Michael's and Parklands high-schools.

"We will be looking to inform the parents and the schools about their actions.

"There are many hidden dangers around quarries.

"Don't put yourself at any unnecessary risk of harm."

In 2011, 13-year-old Dylan Ramsay from Chorley tragically drowned at Hill Top Quarry.

Since his death, his mother, Rebecca Ramsey, has been tirelessly campaigning for more safety measures to be put in place around quarries and reservoirs, as well as raising awareness over the dangers of swimming in such locations.

Posting on Twitter on Monday evening she said: "So angry that people have been swimming at the quarry, especially as we've been trying so hard to highlight the dangers there.

"I will also be contacting the three schools in question and I'd love for the police to offer the teens and their parents a little meet up with me if they want."