German authorities have arrested three men on charges of planning what they describe as "massive" bomb attacks on targets in Germany frequented by Americans.
Possible sites included Frankfurt's international airport, the U.S. military base in Ramstein, bars, and discotheques.
The suspects -- two German citizens and a Turk -- were arrested Tuesday. Federal prosecutor Monica Harms says they amassed huge amounts of hydrogen peroxide for use in possible simultaneous car bombings. She says they were driven by a hatred of U.S. citizens.
German officials say the suspects had been under surveillance since last December. They say the three received terror training in Pakistan at a camp run by the Islamic Jihad Union -- a Sunni Muslim group with ties to al-Qaida.
German Chancellor Angela Merkel says the arrests show the threat of terrorism in Germany is real -- not abstract.
A U.S. State Department spokesman, Tom Casey says the United States is very grateful for German efforts to combat extremism and terrorism.