Federal buildings around the country including here in the city will be seeing extra security in the wake of last week's attack on Canada's Parliament building.
Homeland Security Secretary Jeh Johnson calls the extra measures a precautionary step.
He says they will vary by location and the effort will be re-evaluated on an ongoing basis.
The increased patrols come as terror groups ramp up their calls for attacks on U.S. law enforcement and government officials.
Johnson is also calling on police around the country to be on the lookout for small-scale attacks.
The beefed up security comes a week after a gunman killed a soldier at Canada's National War Memorial before storming the Parliament building.
Canadian Prime Minister Stephen Harper has called the shooting a terrorist attack.