A man and woman have been seriously injured following a two-car crash in Co Laois on Friday night. The driver of the other car left the scene, gardaí said.The crash took place on the L7797 near Moat, Ballinakill, Co Laois at around 10.15pm on July 31st.A male driver, aged in his 80s, and a female passenger, aged in her 70s, were taken to Midland Regional Hospital Tullamore for treatment of serious injuries.Gardaí are seeking to identify the driver of the second car.The road is currently closed pending examination by Garda technical staff and diversions are in place.Gardaí are appealing to anyone who may have witnessed the crash to come forward to Abbeyleix Garda station, by phone or at any Garda station. Road users who were in the vicinity and may have dashcam footage are requested to make this available.Separately on Friday, gardaí said a woman was in critical condition after a crash in Ballyshannon, Co Donegal that left five others also needing treatment for injuries.The incident took place before 10pm on Saturday July 25th. A man in his 40s was arrested at the scene and released without charge pending analysis of a sample by the Medical Bureau of Road Safety.Gardaí appealed for witnesses and those with footage to come forward.A Garda roads policing operation is meanwhile in effect for the bank holiday weekend, running from Thursday until Tuesday.[ Motorist caught driving 172km/h as gardaí detect almost 1,600 speeding offencesOpens in new window ]