With Iran allegedly striking out at Israeli citizens and Jewish targets around the world, Israeli and American security officials in the U.S. are on high alert, ABC news reports.

Israeli officials said that the level of personal security on high-ranking Embassy officials as well as other, lower profile officials in the U.S. is at its highest in at least five years, a response to what they called "a coordinated series of attacks." When Israeli officials travel to and from events, a notable increase in the security presence has been observed.

Frank Cilluffo, director of the Homeland Security Policy Institute at George Washington University in D.C., agreed that the recent incidents in India, Georgia, Thailand and Azerbaijan have "all the hallmarks of a concerted campaign" that could extend to U.S. soil.

"The recent attack on a Saudi official in Washington shows a willingness to attack in the United States," said Cilluffo. "This could be an indicator of a much broader campaign and it is right to take precautionary measures."

Those measures include routine sweeps of cars, residences, and consulates around the country, as well as the Israeli Embassy in Washington.

In Philadelphia, police have issued awareness bulletins asking members of the patrol force to stay vigilant. That city also maintains a permanent presence at Israeli facilities.

In Los Angeles, officials said they have been watching Israeli facilities for weeks now and have stepped up their physical security and intelligence monitoring.