It's understood she did not know the attacker.
The woman killed in an attack in Tullamore yesterday has been named locally.
Ashling Murphy, a primary school teacher aged in her early 20s, was attacked while jogging along the banks of the Grand Canal.
A garda investigation into the fatal assault continues this morning.
The incident occurred along The Grand Canal Way between Tullamore town and Digby bridge near Cappincur around 4 o'clock yesterday afternoon.
Two people walking along the canal attempted to disturb an attack.
Stretch of the grand canal walk in Cappincur, Tullamore remains closed tonight, as victim is removed from the scene.
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The victim's body remained at the scene until 9 o'clock last night so that a technical examination could take place.
A man in his 40s remains in the custody at Tullamore Garda Station.
Gardaí believe Ashling did not know her attacker and are appealing for anyone who was in the area - which is popular location for walkers - at the time to come forward.
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