Officers explained that they were called to The Avenue shortly after 9.30pm on Sunday, April 30, following reports a man had been stabbed.
“Officers attended the scene and after making fast-time enquiries, arrested a 19-year-old man on suspicion of wounding with intent. He remains in custody at this time.”
Air Ambulance Charity Kent Surrey Sussex said its crew arrived on the scene at 9.55pm and worked with the ambulance service and police to help treat the victim.
A spokesperson added: “They then transported the patient to hospital by road with our crew accompanying them in the ambulance to continue delivering their care en route.”
An investigation is ongoing and anyone who saw what happened, or who has any other information, is asked to contact police online or by calling 101 quoting serial 1346 of 30/04.
South East Coast Ambulance Service has been contacted for more information.