RANGERS have warned fans they could face indefinite bans if they are caught smoking at Ibrox.

And Celtic too have pledged to get tough with persistent smokers.

More than 100 fans have been kicked out for smoking at Ibrox in the last year.

And today, on No Smoking Day, the clubs have vowed to step up the fight.

Since the implementation of the smoking ban almost a year ago, both Rangers and Celtic have had to deal with a number of fans repeatedly lighting up in the stadium toilets at half-time.

Laurence Macintyre, Head of Safety at Rangers, said: "Whilst the club has tried to be as understanding as possible with smokers in the transition between a smoking' and no smoking' stadium, more than 100 fans have been ejected from matches over the last year at half-time.

"This may need to be followed up by the suspension of season tickets and indefinite bans if smokers persist in defying the legislation.

"The club has a duty to provide a smoke-free environment for other fans worried about the effects of tobacco smoke on their health."

Ronnie Hawthorn, Head of Safety, Security and Stadium Operations at Celtic, said: "Celtic FC is fully committed to supporting No Smoking Day and all other initiatives which promote a healthy lifestyle.

"Clearly, following recent legislation it is the duty of Celtic FC to ensure that Celtic Park is a smoke-free area and this is something which we will continue to enforce strongly.

"We thank our fans for their support in this regard and we will continue to work in close partnership with the health authorities and Environmental Protection Services to promote a strong anti-smoking message."