commercial adroit bacilli decry less than two hours later , two veiled women - - reportedly the man ' s sister and fiancee - - attacked a tour bus . egyptian police officials and the government - guided al - ahram newspaper said the bus was carrying israeli tourists . after firing on the tour bus , negat yassin then shot and wounded her companion before killing herself . khamis died later of her wounds . officials said they acted in revenge for yassin ' s death . it said police earlier in the day captured two suspects - - ashraf saeed youssef and gamal ahmed abdel aal - - in connection with that attack and were chasing a third , ehab yousri yassin , on a highway overpass when he jumped off , setting off the nail - filled bomb . " we only hope that these attacks do not stand in the way of political reform , " he said in a statement , acknowledging that mubarak had no plans to end emergency law " whether these attacks take place or they don ' t . " two militant groups posted web statements claiming responsibility for the twin attacks - - the mujahedeen of egypt and the abdullah azzam brigades . neither claim ' s authenticity could be verified . women are not known to have carried out past attacks in egypt . fouad allam , a retired general in egypt ' s anti - terrorism security apparatus , said there is no way to compare the recent attacks with those in the 1990 s , which were led by larger , more organized groups that have since been marginalized by a protracted , harsh government crackdown .