A few clarifications. There have been three attacks. The first one injured two people. Early reports had the second one also injuring two, but the BBC is saying only one person was injured on that occasion. The third attack was the fatal mauling of a German woman.
As this story mentions, experts have studied the photos and confirmed that at least two different species are involved, including an oceanic whitetip shark and apparently a shortfin mako. Both of those species are known as kill people on occasion. The Egyptian government claimed that the mako it killed earlier this week was one of the culprits, but this seems doubtful. Its identity could be established either through its stomach contents or possibly by comparing it to the photo taken right before the attack.
BBC News - Egypt shark attacks: 'Multiple species' behind attacks