Egyptian authorities on Saturday closed off a stretch of the country’s Red Sea coastline, a day after a shark attack killed an Austrian woman swimming near the resort of Hurghada. The 68-year-old woman, who lost a leg and an arm in the shark attack, died shortly after she was brought to the private Nile Hospital in Hurghada, an Egyptian health official said. She was barely alive when she was brought in on Friday, the official said, adding that attempts by medical staff to resuscitate her failed. The official spoke on condition of anonymity because he was not authorised to speak to reporters. A…