Published: Oct 30, 2010 4:56 AM EDT
Updated: Oct 29, 2010 10:35 PM EDT

SOUTH FORT MYERS, Fla. - Multiple terror attacks aimed at the U.S. were foiled Friday. Two explosive packages shipped on cargo planes were intercepted before reaching their final destinations. The explosives were sent from Yemen. One was intercepted in Dubai and one on England. Those packages were addressed to Chicago-area synagogues. Cargo planes were searched up and down the East coast.

Tonight Jewish groups in Chicago are on high alert. They're checking any suspicious packages knowing that explosives were being shipped their way.

We talked to Rabbi Bruce Diamond of Community Free Synagogue in South Fort Myers. He said they did receive notices from national and local organizations to keep an eye out for anything suspicious.

They've actually had a longstanding practice that anytime a box arrives, and they don't know who sent it or what is in it, they don't accept it. However, Rabbi Diamond said they keep strong, positive relationships with other local religious communities, and they watch each others' backs.

"Every group, Christian, Jewish, Muslim, Buddhist, Hindu, we're all vulnerable to the things that go thump in the night," Diamond said. "The best security we can possibly have is not putting up walls and hiring guards, but having wonderful positive relationships with each other. Having good neighbors is the best security system you can possibly have."

As a result of the threats, Homeland Security said it will be heightening security measures nationwide. Some measures will be visible, others will not. Of course, they remind everyone to remain vigilant and report any suspicious activity to local law enforcement.