Marines were moved to the U.S. naval base in Sigonella, Italy, to respond to any security crisis at the U.S. Embassy in Libya, an official told CNN Tuesday.
The military official said Monday's deployment was made in coordination with the U.S. State Department, as a "as a prudent measure" following the U.S. military raid in which Anas al-Libi, an alleged al-Qaida operative, was captured.
Libya's government said it summoned U.S. Ambassador to Libya Deborah Jones for questioning about what government officials termed the "abduction" of al-Libi, the country's official news agency LANA reported.
Al-Libi, 49, is an alleged al-Qaida operative accused of having a role in the 1998 bombings of the U.S. Embassies in Kenya and Tanzania that killed 224 people and wounded about 4,000.
He was indicted in the Southern District of New York in the embassy bombings and for his alleged roles in al-Qaida plots to attack U.S. forces in Saudi Arabia, Yemen and Somalia, CNN said.
American Delta Force soldiers captured al-Libi, whose birth name is Nazih Abdul-Hamed al-Ruqai, during the weekend in Tripoli.
On Monday, he was aboard a U.S. Navy warship, where he was being questioned by a high-value detainee interrogation group, which is determining if he has information on al-Qaida operations, future attacks or the location of known associates, U.S. officials have said.
A Defense Department statement says he is being held "lawfully under the law of war in a secure location outside of Libya."
U.S. officials have said al-Liby will be transferred to New York for trial.