Egypt's interim prime minister has condemned the "callous and criminal" attack outside a Coptic church in Cairo that killed three people, including an eight-year-old girl.
Prime Minister Hazem el-Beblawi pledged in a statement that the police would do everything possible to bring the perpetrators to justice.
He said such attacks will "not succeed in sowing divisions between the nation's Muslims and Christians".
More top news
The winner, who beat odds of 292.2 million to one and 170 million other ticketholders, may have to wait 30 years to claim the full jackpot.
Garth Linham worked as a postman for 30 years when he died of a heart attack - but bosses immediately asked for his uniform back.
The reforms are the biggest shake-up of the exam system for a generation. Here's what's changed.