A CRAZE for colourful rock hunting is being hampered by drug users who leave their paraphernalia in popular public places.

Needles – some containing liquid – have been placed alongside painted rocks that are being collected by families around Darlington.

The worldwide Kindness Rocks Project, which has spread to the North-East in recent months, sees participants encouraged to paint rocks and leave them to be found by strangers.

The project is proving incredibly popular across the region, with the Darlington Rocks! initiative attracting more than 2,000 rock hunters in just four weeks.

However, some parents have stopped their children from participating after needles were found in places including Darlington’s Stanhope Park.

Melanie Pritchard, who found a needle propped up against painted rocks in the park, said her family would no longer be joining in the fun.

Ms Pritchard, who called the police and council to report the find, said: “My daughter very nearly grabbed the needle.

“It was obviously put there on purpose and the rocks are clearly going to attract kids.

“The needle didn’t have a cap on and it contained a clear liquid – police told me to contact the council but I told them I was worried a child would find it before they arrived.

“I know it’s not the only place where needles have been found during this game and other parents need to be aware.

“We’ve stopped playing but those who continue will need to watch their kids closely.”

Donna Harrison, founder of Darlington Rocks, said: “I think it’s disgusting, whether deliberately placed near the rocks or not it’s awful to think some people would try to hurt children like that.

“They’re taking part in a game that’s proved so popular over the last few weeks, getting them out and keeping them busy.

“Now families are worried that their children are in danger as they hide their rocks and search for others – it’s a real shame.”

A spokeswoman for Darlington Borough Council urged those enjoying the game to be vigilant and to report any used needles to their Street Scene team.

She added: “Used needles can be a health hazard and should be left to the professionals to deal with.”

To report finding a needle, call 01325 405111, 07966 347101 out of hours or email streetscene@darlington.gov.uk.

The Kindness Rocks project encourages participants to paint messages and motifs on rocks before snapping a picture and hiding them outdoors for others to find.

For more information or to join the rock hunters, visit the Darlington Rocks page on Facebook. Similar projects are proving popular in Middlesbrough and Hartlepool.