A man has grabbed a knife from a supermarket shelf and stabbed six people - including Arsenal footballer Pablo Mari - inside a shopping centre south of the Italian city of Milan, killing one person, Italian media reported.
Police arrested a 46-year-old Italian man suspected in the attack, the news agency LaPresse reported.
A supermarket employee died en route to the hospital, according to the ANSA news agency, which said three other victims were in serious condition.
The motive for the attacks was unknown. Italian authorities said there were no elements to suggest terrorism.