Arsenal defender Pablo Mari who is on loan to Serie A club Monza, was among those injured in a stabbing incident in a supermarket near the Italian city of Milan.
According to BBC Sport, one person died and Mari is among five people injured.
Local media reported that a 30-year-old supermarket cashier died after a man started attacking people in Assago.
A 46-year-old suspect has been detained. Police have ruled out any terrorist motive.
Reports say the attacker has had mental health problems and had grabbed the weapon from the supermarket shelves.
The man started stabbing people at random at about 18:30 local time at a Carrefour in a local shopping centre.
Screams were reportedly heard inside the centre, as terrified visitors tried to flee in panic.
The attacker is reported to have been detained by several customers and handed over to police who arrived at the scene.
Mari, a 29-year-old Spanish defender, suffered a stab wound to the back – but his injuries are not life-threatening. His agent, Arturo Canales, told the BBC that the star was conscious and no vital organs had been affected.
Monza CEO Adriano Galliani told Sky Italy that Mari had been shopping with his wife and young son when the attack took place.
“He had his son in a trolley and his wife next to him. He didn’t notice anything. He then felt something painful in his back, which was the criminal’s knife,” Galliani said.
“Unfortunately, he also saw the criminal stab someone in the throat. He saw everything that happened and it was deeply disturbing,” Galliani added.
While the executive said the defender had suffered a “fairly deep wound on his back”, he said his life was not in danger and that he “should recover quickly”.
Mari joined Arsenal from Brazilian side Flamengo in January 2020. He has only played 19 times for the Gunners and is currently on loan with top flight Italian club Monza.