The police last night said they were looking to speak to two people that were in the area that night and were recorded on CCTV.
The first was a man in dark clothing walking in the area, while the second was a woman walking her two small dogs on the evening in question. CCTV images of the two individuals were released by police to help the public identify them.
Pictured: The CCTV footage images.
Officers have so far arrested four youths on suspicion of being involved with the stabbing.
A trio was arrested on Monday – boys aged 16, 17 and 18 – while a fourth youth aged 16 was arrested on Wednesday morning (12 January). They remain in custody.
The Force said on Tuesday that the victim was “recovering following several hours of surgery”.