Intelligence sources have warned that the Islamic State (ISIS) is plotting to carry out terrorist attacks on tourists at beach resorts across Europe this summer, Fox News reports.

"They want to strike Italian, French and Spanish beaches," Seck Pouy, a police chief from Senegal, claimed.

"They will exploit certain radicalised vendors who travel regularly between Italy and Senegal," he added.

Italian security sources reportedĺy alerted the German newspaper Bild that terrorists loyal to ISIS and allied to Nigeria's Boko Haram are going to attack resorts, posing as "drink vendors and placing bombs under sun beds."

The paper said the terrorists will also be "detonating suicide bombs and gunning down tourists with automatic rifles."

The Mirror says it has received reports that the terrorists have formed "concrete plans" to launch the attacks.

However, the Italian Interior Ministry issued a statement saying said the claims were baseless, adding that Italy's beaches are safe for citizens and tourists.

A senior German security source, meanwhile, admitted that "holiday beaches cannot be protected," according to Bild.

Police earlier arrested a suspected ISIS collaborator during a raid in Palma, the capital of the Spanish holiday island of Majorca.

Majorca officers accused the man—an unnamed suspect who was born in Morocco –of promoting terror attacks in Europe.

He was also accused of having close links with ISIS leaders who are based in Syria and Iraq, the Mirror reports.

In June, terrorists gunned down 38 people, including 30 British citizens, on a beach resort in Tunisia.