Parts of Athens were paralyzed yesterday as police had to chase up tens of bomb hoaxes targeting government offices, media organizations and public transport with yesterday’s most serious incident forcing the landing of an Olympic Airlines flight. Police said that the caller, believed to be behind more than 22 bomb hoaxes made from Tuesday night to late yesterday, is about 35 years old but cannot get closer to him due to legal restraints. The prankster has been calling police from a prepaid mobile phone without hiding his number but authorities do not have the power to request data about the telephone call as it is protected by privacy laws. Yesterday an Olympic Airlines flight bound for Cyprus returned to Athens after a hoax claim that a bomb containing anthrax had been hidden on the plane. The flight returned to Athens shortly after takeoff but not before an emergency operation was launched including two fighter jets, a navy vessel and different rescue teams.