A gunman opened fire in a market in Strasbourg, France on Tuesday, killing at least four people and injuring 11 more, according to The Independent.
Police identified the suspect as a 29-year-old man who was a known potential terrorist threat and who had been searched earlier in the day by police in connection with a robbery.
The Independent reported Tuesday evening that the suspect had been cornered by police and that shots had been fired, but it is unclear whether he has been apprehended or killed.
The French prosecutor's office told the Associated Press that it has opened a terror investigation into the incident. There is no known motive for the attack at this time.
According to a French news network, the suspect fled his apartment while police were searching it earlier in the day in connection with a robbery. Authorities found grenades in his home.
The attack took place near the European Parliament.
"I express all my sorrow for the victims of the Strasbourg attacks," European Parliament president Antonio Tajani wrote on Twitter. "This Parliament will not be intimidated by terrorist or criminal attacks. Let us move on. We will continue to work and react strengthened by freedom and democracy against terrorist violence."
Strasbourg is located in northeastern France, near the German border. It is about 300 miles east of Paris.
France was already dealing with significant turmoil related to violent and widespread protests over President Emmanuel Macron's environmental and economic policies.
Macron has failed to make any progress toward ending the protests, despite offering costly economic concessions to protesters that would cost the country about $11 billion, according to CBS News.