The San Francisco Police Department urged residents Tuesday afternoon to report any suspicious activity following the terrorist attack in New York City earlier in the day that left at least eight people dead.

There were no known threats to San Francisco, though The City’s public safety agencies have been in communication with state and federal authorities, the Police Department said in a statement.

“The safety of all San Francisco residents and visitors is our number one priority,” the department said in the statement.

Anyone who sees suspicious activity is urged to call 911 or talk to a nearby police officer.

The attack happened when a speeding Home Depot truck plowed down riders on a Lower Manhattan bike path in a terrorist attack, sources said. Eyewitnesses told police the driver yelled “Allahu akbar!” — Arabic for “God is great!” — after running down helpless riders from behind, their mangled bodies left scattered behind his runaway rental truck.

The man was arrested after police shot him in the rear end after a Tribeca crash between the truck and a school bus.

Tribune News Service contributed to this report.

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