A cross border investigation is continuing this morning following an incident in Strabane on St Patrick's Night in which four men were stabbed.
Three men remain in a serious, but non-life threatening condition in Altnagelvin Hospital following the incident outside Joes Bar in Abercorn Square.
It's believed their attackers fled across the border into Donegal.
The men who are still in hospital are the bar owner, and two brothers in their twenties.
The 26-year-old had to recieved 200 stitches after being slashed from his shoulder down to his waist, while his 28-year-old man recieved wounds and inch deep.
The owner of the bar recieved a deep stab wound to his hand.
It's understood the incident happened, after a group of up to twenty people were turned away from the bar, as it was already too packed.
The group then tried to force their way into the bar, and that's when the fracas broke out.
Police on both sides of the border are trying to track down the group of men, who are believed to have crossed the border into Donegal shortly after the incident.