Industrial action in the UK and Spain will disrupt festive flights.
One of the suspects was a friend of the victims' daughter.
Advert features a number of Mallorca's hotels.
A Spanish deal is said to be nearly finalised.
"I want to see is everybody involved, everyone using their vote while at the same time all the political parties addressing the community at large, and by that I mean foreign residents as well."
Real Mallorca's Copa del Rey campaign continues.