BERLIN, Germany (CNN) -- The German government raised its terrorism alert level after al Qaeda posted a video on the Internet threatening attacks in Germany if this month's elections do not come out the way the terrorist organization wants.

"The federal elections offer a special [opportunity] for propaganda and operative activity by terror groups," the Interior Ministry said on Friday. "A new video posted on September 18 by al Qaeda underlines this. The security services have therefore increased the threat level, which leads to increased security measures especially at airports and railway stations."