Czech police end search of Lufthansa flight after bomb threat PRAGUE (Reuters) - Czech police were questioning a 34-year-old man who they said made a hoax bomb threat against a Lufthansa flight that landed in Prague on Friday, a police spokeswoman said. Police and bomb experts found no explosive device after searching the plane and 144 passengers for several hours when the Frankfurt to Prague flight landed around 10:40 a.m. Airport operations were not affected, a spokeswoman for Vaclav Havel Airport Prague said earlier. Officers were questioning a man with a mental illness who they believe phoned in the threat, saying what he described as terrorists were on the plane, the police spokeswoman said. Reporting by Jason Hovet and Jan Korselt; Editing by Alison Williams, Larry King