    Sentence 1:.Two Iraqis and two  Saudis grabbed shortly after the  blast gave.-information leading  to: the arrest of thé others .,  said the official .   Sentence 2: The.‘official ,. who  spoke on. condition of anonymity  , said that ‘two Iraqis and two  Saudis detained after the attack  gave information leading to the  arrest .of the others .