A man in his 40s was being held at Henry Street Garda Station last night under section 4 of the Criminal Justice Act.
The victim, in her 20s, was treated at St John’s Hospital with what were described as non life-threatening injuries.
Superintendent Frank O’Brien said a major investigation into the attack was under way and they have accessed CCTV at Guiney’s shop in William Street where the attack was carried out.
Supt O’Brien said gardaí were alerted at about 11.30am. “She was assaulted with a robust chain used to lock a bike,” he said.
One person in the shop said the man who carried out the assault became very aggressive over a refund he was demanding for some item he had previously purchased.
The witness said: “The woman working in the shop said he needed a receipt, which it would appear he did not have. In accordance with the shop’s policy she told him he could replace the item, but she could not give him a refund. He then went violent and struck her with a chain.”
The man who carried out the assault was immediately arrested and brought to Henry Street where he was still being held last night.