Police are continuing to question a 22-year-old man on suspicion of attempted murder in connection with an incident in Chepstow Road in Newport last Tuesday.
The man, from Newport, was arrested on Friday morning and magistrates granted a warrant of further detention last night.
A 24-year-old Newport man, arrested on suspicion of attempted murder on Thursday, has been bailed.
Two Cardiff men, aged 22 and 24, arrested on suspicion of drugs offences, were bailed last week.
Officers are continuing to make enquiries to locate the firearm used in the incident, as well as a dark coloured 4x4 jeep type vehicle that was seen driving along Chepstow Road and onto Beechwood Road in the direction of St Julians and Christchurch.
If you were in the area between 11pm and midnight on Tuesday 3rd September and have information relating to the vehicle or the incident, please call 101 quoting log 586 03/09/13 or call Crimestoppers anonymously on 0800 555 111.
More top news
Friday night is not looking the brightest, and I am sorry to say there is worse to come for the start of the weekend!
Wales' Women face their first clash of the Six Nations against defending champions Ireland Saturday at Donnybrook
The body of John Sabine was found behind flats on a council estate in Beddau, near Pontypridd, last November.