Authorities stressed that initial communications made no mention of terrorism being suspected as a motive.
A man wielding a knife at the Montparnasse train station in Paris was shot and wounded by police on Friday, the city's prosecutor’s office said.
At least one shot was fired during the incident involving a 44-year-old man "known for domestic violence," a statement said.
It added that the man then apparently inflicted knife wounds on himself and emergency services were called.
"A 53-year-old bystander, who was shot in the foot, was also treated by the emergency services," the public prosecutor's office said in a statement.
Authorities stressed that initial communications made no mention of terrorism being suspected as a motive.
French rail operator SNCF said that a security perimeter was set up "on a small part of the station" following the police intervention, causing slight traffic disruption.
The incident comes a day after the 10th anniversary of coordinated terrorist attacks in Paris by the so-called Islamic State group in 2015 in which 132 people were killed.