Michigan Governor Gretchen Whitmer said an incident where a vehicle was rammed into the Temple Israel synagogue near Detroit on Thursday was antisemitism and "hate, plain and simple".
The FBI is investigating the incident as a "targeted act of violence against the Jewish community" but a motive for the crime remains unclear.
No staff or children at the synagogue and its attached school were hurt. A security guard was being treated for injuries and was expected to recover, law enforcement said.
The suspect, identified as Ayman Mohamad Ghazali, drove "with purpose down the hall of the building" before he was "neutralised" by security guards, police said. The vehicle then caught fire.
During remarks on Friday morning, the governor said antisemitism had been rising in the US.
