Director of Sinai Conservation Mohammed Salem says the shark attacked a Russian couple swimming Tuesday at a beach in Sharm el-Sheikh, a renowned diving spot known for its coral reefs.
The shark badly injured the woman's legs and back and ripped apart the man's legs.
He says another Russian tourist swimming in the nearby Ras Nasrani area was attacked on Wednesday, most likely by the same shark, and lost an arm.
Salem says the tourists were flown to Cairo and hospitalized in critical condition. He says authorities are hunting for the shark.