A number of children have been treated in hospital after taking an anti-anxiety drug in a park in Portsmouth, police said.

The boys and girls, aged between 13 and 15, were admitted to the Queen Alexandra Hospital in the early hours of Thursday.

A Hampshire police spokeswoman said the teenagers had taken a number of tablets, believed to be diazepam, at Kingston recreation ground on Wednesday evening.

"Some of those involved are still receiving treatment, others have been discharged and are recovering at home.

"No serious illness has been reported at this time," she added.

Police are currently working to identify all those involved or in possession of the tablets to stop them being shared further.

Portsmouth Neighbourhoods Policing Sergeant, Iain Clancy, said: "As always, we would urge people not to risk their health by taking unknown tablets or substances.

"My team is in touch with local schools to reinforce this advice to young people.

"Please contact us if you have any information. Anyone who has taken tablets should seek medical advice."