As Allied firepower rained down on Serbia, an Athens, Greece-based Apple computer reseller suffered the backlash, with its computer hardware store was bombed in what the Greek police suspect was an attack by an anti-American terror faction. The Greek police were warned via a television broadcast that a store selling American computers would be bombed. There were no casualties in the explosion. The bomb is just one in a concerted campaign, probably by the same group, focused on the American presence in the city. Three bombs, each preceded by warnings, have exploded in different branches of American financial institution Citibank, the most recent on March 28. During the Gulf War in 1991, Athens was shaken by a similar campaign, the bombers targeting Citibank and American Express.