A witness has described the horrifying moment she saw an attacker on roller skates stab a man.
Three people have been taken to hospital following the incident in Knowle.
Police have confirmed the incident was a stabbing.
Officers have cordoned off a section of Wells Road and a man in his 30s has been arrested.
We are reporting updates on this incident here.
You can read full statements from emergency services here.
An eye-witness, who only wanted to be known as Rebecca, said she was with her partner and two-year-old son on the west side of Wells Road, close to My Dentist on the outside of the Broadwalk Shopping Centre, when she saw the attack unfold.
“It was about 2.30pm and we were crossing the road and we saw a man running away from a man who was on roller skates behind him.
”At first we thought they were joking around - it was a guy on roller skates chasing a guy running away.
”But then the man running ran into the off licence next to the dentists and the man on skates caught up with him...”
It was at this moment the woman says the man stab the victim.
She added: “It was literally right behind us as we were waiting at the traffic lights.
“It was just horrible, and scary because I was worried about my little one. To see this in front of me was horrible.”
A shop worker told Bristol Live they saw a man covered in blood run into Subway in Broadwalk Shopping Centre pleading for help.
Bhara Ni said a man ran into the sandwich shop covered in blood asking for help at around 2.30pm.
He said: "We stopped serving and ran to help him. The ambulances came and we heard other people had been stabbed. It was awful to see”
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While Sully from Sully Cycles which is located near to where the attack took place said he was walking away from Lloyds pharmacy when a man standing near to a police officer came up to him and asked him if he was stabbed.
"I just replied 'no I've got no fresh holes in me'," said Sully. "There were loads of police cars outside Subway so I'm guessing it happened near there."
