According to the AP, the press office for the town of Adeje, a municipality on Tenerife where the hotel is located, also said Tuesday that H10 Costa Adeje Palace hotel on Tenerife, the largest of the Canary Islands, was under quarantine.
The hotel, its parent chain and the town hall did not respond to requests for comment.
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One of the hotel guests, Rebecca Lunt, told NBC News via Facebook Messenger that guests were not allowed to leave but that the hotel's restaurant was still open.
Lund said guests received a note under their doors Tuesday in English, Spanish, French and Italian. She said on social media that it said the hotel had been closed down "for healthy [sic] reasons."
"Until the sanitary authorities warn, you must remain in your rooms," the note said.