Israel and Egypt signed a peace treaty in 1978 and the eastern coast of the peninsula is a popular international tourist destination.
A look at the Suez Canal, one of the most important engineering projects of the 19th century.
11 migrants were also wounded by what the security sources say were gunmen.
Islamic State's Egypt affiliate, Sinai Province, claimed responsibility for the attacks killing 30; Israel closed border crossings as precaution.
Egyptian terror group Sinai Province claims responsibility for attack.