A heroic police officer spotted a suspect running away with a knife and reportedly tackled him to the ground in the UK town of Reading to prevent them from harming others.
A source said there had been three fatalities, but this has not been confirmed by police or emergency services.
A distressing video on social media showed four people on the floor, surrounded by witnesses and officers.
“A man pulled a knife and started attacking people at random in Reading, near the Crown Court,” The Sun reported.
“It is thought there was one attacker who has surrendered to police.
“It appears the attack was stopped when a lone sergeant, who responded when the alarm was raised, ran to the scene, saw the attacker running away with a knife and rugby tackled him to the ground.”
“Police attended at around 7pm along with other emergency services,” Thames Valley Police said.
“Officers arrested a man at the scene who is now in police custody. A number of people sustained injuries and were taken to hospital.
“A police cordon is in place in Forbury Gardens as officers investigate. We are asking the public to avoid the area at this time.”
At least two people are being treated for knife wounds in hospital.
South Central Ambulance Service NHS Foundation Trust said in a statement: “Multiple ambulance resources were sent to the scene including, five ambulance crews, one specialist practitioner, three ambulance officers, our Hazardous Area Response Team (HART), the helicopter and critical care response unit from Thames Valley Air Ambulance and the critical care unit from Hampshire & Isle of Wight Air Ambulance, two ambulance doctors and our colleagues from London Ambulance Service.
“We were assessing and treating a number of casualties who had sustained injuries as a result of the incident. Thank you to all those people who stopped and helped those who were injured as a result of this situation.”
One eyewitness, who said he was around 10 metres from the scene, said the attack looked “completely random”.
This article originally appeared on The Sun and was reproduced with permission.