Rome's Ciampino airport was closed Tuesday for a bomb threat, an Italian news report said. The airport, which mainly operates low-cost airlines, was closed shortly before 9 a.m. (0800GMT) after officials received an anonymous phone call saying that an explosive device was on a cargo plane, the ANSA news agency reported. Flights were being diverted to Rome's main Leonardo Da Vinci airport, ANSA said. Airport officials could not immediately be reached for comment.