Seven teenagers, aged 14-17, have been arrested on suspicion of attempted murder after a 46-year-old man was stabbed in the neck on New Year's Eve.
The assault occurred at around 5:50pm, close to Oxted train station, after the victim spoke to a group of youths.
Following the assault, the group proceeded to flee the scene, using a station underpass.
Six of the seven teens were later arrested at the Esso service station on the A25 on suspicion of attempted murder, the seventh was arrested this afternoon.
Detective Sergeant Kerry Akehurst said:
"This is a shocking crime and we are doing everything we can to understand what happened and who is responsible. There will be a substantial police presence in the local area today as we conduct house to house enquiries and search for further evidence. Meanwhile I want to appeal for the public's help with three very specific lines of enquiry:
"I want to speak to everyone who used Oxted station, the shops in Station Road West, or travelled along Station Road West, between 5pm and 6pm yesterday evening. I am especially keen to see any mobile phone, dashcam, helmet cam, or CCTV footage from the area. It is a busy route and I am clear that we need to trace everyone who was in that area and saw the events that led to this incident."
"I want to speak to anyone that saw a group of youths (described by witnesses as white or mixed race, aged 15-18-years-old and all wearing dark grey or black hoodies) in Oxted between 5.50pm and 8.15pm. We believe that they left the scene towards the Morrison's Supermarket, but it is important we understand for the investigation what route they took from there, and what they were doing.
"I want to appeal to local residents in and around Oxted to check their front gardens and bins, and keep an eye out as they take walks in the local area. We have yet to locate a weapon, and it may have been discarded in the local area - possibly with items of clothing. If you do find something that could be related to the incident, please do not touch it but contact police immediately."
Anyone with information is urged to contact Surrey Police, either via 101, or by using the Live Chat function on the Surrey Police website which will put you in direct contact with a call handler. Quote reference PR/45200137553.