rtokens: After a search of the aircraft following the hijackers ' surrender , police found only knives and fake explosives .
pos: DT NNS VBD TO VB PRP RP IN DT VBG NN IN NNP IN PRP VBD VBN TO NNP .
tokens: The hijackers threatened to blow it up during a refuelling stop in Cyprus unless they were taken to London .
ltokens: The hijack began on Monday when an Amman-bound plane was taken over shortly after it took off from Khartoum .