Police are investigating after a man with stab wounds checked himself in at Wairarapa Hospital this morning.
It is thought the 20-year-old man was stabbed between 1am and 1.30am this morning , police said.
Due to the serious nature of the man's injuries he was flown to Wellington Hospital for surgery. He is now in a stable condition.
Masterton Police are seeking information from the public.
The incident is believed to be gang-related, Detective Sergeant Dean Cadwallader said.
Police have limited information but will keep a visible presence in "areas of interest" while they investigate the stabbing, Cadwallader said.
Anyone with information is asked to call Masterton Police Station on 06 370 0300 or Crime Stoppers anonymously on 0800 555 111.