A Fianna Fáil TD faces potential prosecution after recently failing a breathalyser test at a Garda checkpoint.

Malcolm Byrne is a TD for Wicklow-Wexford.

The politician had been travelling to Dublin Airport on Thursday morning when he was stopped at a checkpoint.

The Irish Independent report that Mr Byrne failed the breath test, but is currently awaiting the results of a urine test.

The TD confirmed to the publication that he had been ‘arrested on suspicion of drink driving.’

He added that he was co-operating fully with An Garda Síochána.

The urine test will confirm whether Mr Byrne was over the limit or not. If it comes back that he is, he faces prosecution for drink-driving.

If the urine test comes back below the limit, that will be used over the breath test.

A statement from Fianna Fáil confirmed to Extra.ie that they were informed of the arrest and will ‘consider any developments in relation to this matter.’

They said: ‘The party has been informed by Deputy Malcolm Byrne that he was arrested on suspicion of drink driving after he was stopped at a mandatory Garda checkpoint in Dublin.

‘The party will consider any developments in relation to this matter.

‘As this is an ongoing investigation and Deputy Byrne is cooperating fully with An Garda Síochána, it would not be appropriate to comment further at this time.’

The Garda checkpoint came at the start of a major roads policing operation carried out by the force throughout the bank holiday weekend.

An update from Gardaí on Monday morning confirmed 140 people were arrested for driving under the influence of an intoxicant, while 3,140 drivers were detected for speeding offences throughout the operation.

Among the most notable of speed breaks was a motorist travelling at 102km/h in a 50km/h zone on the R183, Dernaglug, Doohamlet in Monaghan.

Meanwhile, Gardaí say over 340 drivers were caught either holding a mobile phone or not wearing a seatbelt throughout the bank holiday weekend.