The Department of Homeland Security is beefing up its presence at airports, train stations and other travel hubs in the United States in the wake of global travel warning imposed on all U.S. citizens.
Local authorities are not going into specifics but the San Francisco Police Department does acknowledge receiving a bulletin by the Federal Bureau of Investigation and DHS. The SFPD says their officers are monitoring various areas of the city and will determine if additional resources are necessary.
They say they have the ability to rapidly deploy and redeploy resources as the department deems necessary.
No specific location has been mentioned, but authorities are keeping a close eye on airports, train stations and other transportation hubs. There is also increased scrutiny of visitors coming into the United States.
Appearing on Fox News Sunday, Heritage Foundation President and former South Carolina Senator Jim DeMint expressed concern over the United States appearing weak in the eyes of the world and as a result, al Qaeda has made a strong comeback.
The State Department has said it will monitor the situation and will issue more warnings if necessary.
On Fox News Sunday, Heritage Foundation President and former South Carolina Republican Senator Jim DeMint said Al Qaeda "may be more of a threat to us than they were before before 9/11" because they perceive President Barack Obama to be a weak president.
While agreeing with the Obama administration's decision to close embassies throughout the Muslim world on Sunday due credible threats, DeMint said America's enemies have been emboldened.
"Our attempt to placate parts of the world... is clearly not working," DeMint said. "The perception of weakness in the administration is encouraging this type of behavior."