Update 6.14pm: A male aged in his 40s has been arrested by Gardaí investigating a fatal collision at Glengoole, Thurles.
The man was arrested this afternoon and is currently being detained under Section 4 of the Criminal Justice Act at Thurles Garda Station.
A male pedestrian was fatally injured yesterday and all indications at this stage are that the deceased was struck by a vehicle which failed to stop.
The scene of the collision has been reopened to traffic.
The investigation is ongoing and further updates will follow.
Earlier: A pensioner was killed in a suspected hit-and-run accident in Co Tipperary last night.
The accident occurred at Poynestown, Glengoole, Thurles at around 10.20 pm.
The 68-year-old male pedestrian was fatally injured and "all indications at this stage are that the deceased was struck by a vehicle which failed to stop", according to gardaí.
The man's body of deceased remains at the scene. The road has been closed between Ballysloe and Glengoole for technical examination and local diversions have been put in place.
Gardaí in Thurles are appealing for witnesses or any person who can assist with the investigation of this fatal hit and run road traffic collision, to contact them at Thurles Garda Station on 0504 - 25100, the Garda Confidential Line 1800 666 111 or any Garda Station.
It has been a tragic weekend on Irish roads, after the death of a six-year-old boy and three motorcyclists as well as this latest accident in Tipperary.
The young boy passed away in hospital yesterday after being knocked down and seriously injured on Friday evening on Dublin's Shanganagh Road.
The three motorcyclists died in separate crashes in Limerick and Dublin on Saturday night.
More than 90 people have lost their lives on the roads so far this year. Road safety chiefs are urging motorists to slow down.
In July 2016 there were 21 road fatalities. So far this July there have been 16 fatalities, with seven people losing their life in the past seven days alone, including four motorcyclists.
Assistant Garda Commissioner Michael Finn said: “This is an extremely high risk time on the roads. People are on holidays, more relaxed, more off guard.
“There are thousands of visitors from abroad, people travelling to unfamiliar locations, more agricultural machinery on the roads – these all form part of the how and why it’s riskier this time of year.
“We can see how easy it can turn to tragedy on the roads, as recently 3 people lost their life returning from a holiday and over the weekend 4 motorcyclists lost their life in fatal road crashes.
“Please take personal responsibility for how you act on the road no matter how you use it, and be as safe as you can be.”
He added: “People are still speeding, and even in a recent 24 hour period we detected extremely excessive speeds.
“People are still drink or drug driving, using a mobile phone whilst driving and not wearing safety belts. These are high risk actions on the road.
“An Garda Síochána will continue to target these offences to make the roads safer.”