Gardai in Loughrea were continuing to question a man yesterday evening in relation to the death of a woman on a farm near Portumna earlier this year.
The arrest follows an investigation into the death of Chrissie Treacy (75 ) following an incident on her farm in Boula, near Portumna, earlier this year.
Ms Treacy died after she was struck by a vehicle on April 27.
The man, who is believed to be in his fifties, was arrested in the Portumna area on Tuesday morning and detained at Loughrea Garda Station under Section 4 of The Criminal Justice Act 1984.
It is understood he was due to be released from custody yesterday evening.
