CS gas in school - three held

Pupils were suffering from irritation to their eyes

Three pupils have been arrested and released on police bail after a CS gas canister was let off at a north Wales school.

More than 20 pupils and a teacher had to be treated at the casualty department of Ysbyty Glan Clwyd in Bodelwyddan, following the incident just after 1400 BST on Friday at Rhyl High School.

It is believed the spray was let off in the school corridor, causing injuries including eye irritation, as people walked by.

The entire school was evacuated as firefighters ventilated the premises.

Headteacher Mike Williams said anyone held responsible for the letting off the canister would be "dealt with".

"The bulk of pupils who were briefly in contact were told to get fresh air - as recommended by the ambulance service.

"Some were affected more than others and they were whipped into hospital for checking and they are okay now."

North Wales Police said they are continuing to investigate the matter and a number of items including the gas canister have been sent for forensic examination.

Physical effects of CS gas are felt almost immediately.

Symptoms include severe burning in the eyes, involuntary closing of the eyes, extreme burning in the nose and extreme burning in the throat.