Gardaí in Letterkenny are investigating two serious incidents in which a man was stabbed and another was threatened with a meat cleaver.
In one incident a male shop assistant had a meat cleaver held to his neck by a man who stole cash from the Checkout Express store in Oldtown at 5.55 pm on Sunday.
The man forced a female shop assistant to hand over cash before he fled.
A passing Garda detective saw a man with his face concealed and carrying an implement leave the store. The garda purused him up Lower Main Street on foot.
The man was arrested at Riverside Apartments.
A shopping bag containing cash and a meat cleaver were recovered.
A 23-year-old man with a Letterkenny address, but who is understood to be from outside the county, is is due to appear in court today in Longford charged with possession of knives and robbery.
Gardaí are also appealing for information about an incident in which a man was stabbed at a house at the Ard Lonan estate in the Long Lane area of the town at 10.30 pm.
A spokeswoman at Letterkenny Garda Station said a 44-year-old man was taken to Letterkenny University Hospital with injuries which are not believed to be life-threatening.