A 32-year-old man arrested in connection with a brutal paramilitary-style shooting last week and a previous attack in March has been released unconditionally.
The man, from Lettershandoney, just outside Londonderry, was arrested by PSNI officers at the weekend.
The arrest comes just days after a 33-year-old man was 'shot by appointment' in Derry's Bogside. The victim was told to be in an alley in Lisfannon Park at 9.30pm, where he was met by four masked men who ordered him to lie on the ground before shooting him in the legs and the abdomen.
Residents had to use bath towels to stem the blood from his injuries and comforted him until the ambulance arrived. He had told those tending to him that he was from Dungiven, some 20 miles away.
The attack was just one of three to occur in the north west last week.
Last Sunday night 65-year-old Mary Peoples had a pipe bomb thrown through her bedroom window.
The device, which failed to explode, was taken out of the house by the pensioner's son Ryan who threw it into a green area, before moving it himself 24 hours later and alerting the PSNI.
The young man had been warned by police that his life was under threat by dissident republicans.
And on Wednesday night a 22-year-old man was abducted from outside his Strabane home, hooded, bound and beaten by a gang in a vicious attack.
The man, who lives at Carlton Drive in the town, was walking near his home when he was pulled into a large grey Transit van, had a hood placed over his head and had his hands and feet bound.
He was driven to an area outside the Co Tyrone town and beaten viciously for nearly an hour.
Police said paramilitary involvement is one line of enquiry.