A man attacked a police officer with a knife outside a police station in Brussels on Tuesday morning, and another officer shot the assailant, officials said.

Both the injured officer and the attacker, whose name was not released, were hospitalized with injuries that were not life-threatening, said Ilse van de Keere, a spokeswoman for the Brussels police.

The suspect “is not known by our national terrorist watchdog agency and its databases,” Belgium’s interior minister, Jan Jambon, said in an interview on national radio. “According to our information he was detained in a psychiatric institution and recently released.”

According to local news reports, the man yelled “Allahu akbar,” Arabic for “God is great,” raising concerns about another Islamist terrorist attack in a city that has endured several of them.