There was chaos in Galway city centre overnight as gardai received separate calls of a serious assault, a stabbing, a robbery and threatening behaviour, all between the hours of 2am and 3.30am.
A man remains in a critical condition today after a serious assault in the city centre in the early hours of this morning.
Gardai are investigating the incident which took place on Shop Street at approximately 3.30am.
The incident occurred when a number of youths became involved in an altercation outside a fast food outlet, according to gardai.
A 22-year-old man received a very serious head injury and fell to the ground during the fight.
The young man was unconscious when gardai and ambulance teams arrived at the scene.
He was taken to University Hospital Galway where his condition is described as critical.
The scene has been preserved for a technical examination.
Gardai have set up an incident room at Galway Garda Station and are appealing for witnesses or anyone who may have been on Shop Street between 3.20am and 2.40am last night to get in contact.
Meanwhile, separately, gardai are investigating a number of other incidents including a stabbing, threatening behaviour and a robbery between the hours of 2am and 3am in the same area.
At approximately 2.15am, a 38-year-old man reported to gardai that he had been threatened by a man with a knife on the Headford Road.
Soon after, gardai received a call that two men in their twenties had been robbed and threatened at knife-point on the corner of Headford Road.
Two mobile phones and a wallet were stolen in the incident.
The two men reported that the suspect had left the scene in the direction of Wood Quay.
Gardai were then made aware of an 18-year-old man who had received a stab wound to his stomach in the Wood Quay area.
The stabbing occurred at 2.30am, approximately 15 minutes after gardai received the first call.
The victim was taken to University College Hospital Galway where his condition is described as non life threatening.
A man fitting the description of the suspect was arrested at 3am and is detained under the provisions of section 4 of the Criminal Justice Act 1984 as amended.
Gardai are appealing for witnesses,or anyone who may have any information to contact Galway Garda station on 091 538000 an incident room has been set up, the Garda Confidential Line on 1800 666 111 or any Garda station.