Isis members have reportedly issued direct threats to popular Spanish tourist destinations.
Warnings from fanatics are thought to have been found on social media as members of the terror group attempts to recruit translators and foreign jihadists from the country.
The threats are included in a government report, quoted in the Express.
The official document claims “ISIS has been publishing in Spanish, which means an increase in the risk of its influence on radicals living in our country”.
It states last year “Daesh launched a campaign to hire Spanish translators, which suggests a growing interest in attracting Spanish-speaking foreign fighters”.
Around 15 million British holidaymakers visit Spain every year.
A Foreign Office spokesman said its travel advice remains under constant review.