ROME (AP) — A driver plowed into pedestrians in the northern Italian city of Modena on Saturday, injuring eight people, four of them critically, before trying to flee and being detained by police, local authorities said. They said the man was known to officials for having mental disorders.

Authorities identified the driver as Salim El Koudri, a 31-year-old second-generation Italian born in Bergamo and living in the province of Modena. El Koudri, who holds a degree in economics, is unemployed, authorities said. He was detained and questioned at police headquarters in Modena as investigators tried to determine whether he acted deliberately.

Investigators said at a press conference Saturday evening there was no immediate indication the man was under the influence of drugs or alcohol. His home was searched as part of the investigation.

Modena Prefect Fabrizia Triolo said el Koudri had been known to local mental health services for schizoid disorders, while officials stressed that early findings pointed to possible mental instability but required further verification. No links to extremist groups emerged.

Mayor Massimo Mezzetti said no one was killed in the dramatic crash but four victims were in serious condition. He said a woman was pinned against a shop window and required the amputation of both legs.

Mezzetti said the vehicle entered one of the city’s main streets and the man “drove onto the sidewalk, sending several people flying,” before crashing into the shop window.

Victims were taken to hospitals in Modena and Bologna, including by helicopter for the most critical cases.

El Koudri attempted to flee but was stopped first by some of the citizens involved in the crash and then by police and taken to headquarters for questioning.

Witnesses reported the man was holding a knife, but he did not manage to stab anyone, the mayor said, adding that investigators are still working to determine whether the act was deliberate or linked to other causes.

“Whatever the nature, it is a very serious act,” Mezzetti said. “If it were an attack, it would be even more serious.”

Italian Premier Giorgia Meloni called the incident “extremely serious” in a social media post and expressed solidarity with the victims and their families.

Meloni thanked citizens who intervened to help stop the suspect and praised law enforcement, adding she was in contact with local authorities and expected the suspect to be held fully accountable.

Emergency services, including police, carabinieri and financial police, responded to the scene, which was cordoned off as ambulances treated victims in the street.