The three victims, including two men and a woman, were attacked in two seperate locations in Wigton, Cumbria this afternoon.
Emergency services, including an air ambulance, were scrambled to reports of the triple stabbing at around 2pm.
The injured victims – two of which were in serious condition – were then rushed to hospital.
One person described seeing a “man drenched in blood”.
They added: “Air ambulance circling overhead, police and ambulance vehicles all over the place.”
Other reports on social media suggested the incident was a “mass stabbing”.
One resident told the News & Star: “We had a message and were told to lock our doors and stay inside, it’s really scary.”
Another, who did not wish to be named, added: “It’s mental, you don’t expect something in a small town like this.”
Cumbria Police, who placed a large cordon areound the area, said a 52-year-old man was arrested.
A spokesman for the force said: “Police are currently dealing with an incident in Wigton.
“A 52-year-old man from has been arrested following an incident where three people were assaulted.
“At 1:50pm it was reported to police that three people were assaulted in Wigton.
“A woman was injured on Church Street. Two men were also injured on King Street. All three are being taken to hospital.
“We are working quickly to establish the circumstances of what has occurred and who is involved.”.
A spokesman from the Great North Air Ambulance added: “We were called out at 2pm, and arrived in Wigton 10 minutes later.
“Our crews are currently on the scene.”