Romane Guilloux, 20, a guest from France, asked about the lockdown imposed on patrons of the hotel, the H10 Costa Adeje Palace, a four-star resort in the south of Tenerife, the largest of the islands.

The Costa Adeje Palace, a four-star resort with a restaurant, pools and over 450 rooms, is one of at least two hotels to be locked down in Europe. ... Andrea Mantovani for The New York Times.