The club has asked police and the government to reinforce the number of anti-terrorism agents put at the airport where the players will arrive as well as at their hotel and at the Romareda stadium where the match will be held, sports daily Marca reported.

No one at Real Madrid was immediately available to confirm the report.

ETA, whose four-decade campaign to achieve independence for the northeastern Basque region of Spain has claimed more than 800 lives, said Tuesday it would as of midnight "act on all fronts" to campaign for an independent Basque state.

In a statement sent to two Basque newspapers, ETA said it was ending the ceasefire it declared in March 2006 because the Spanish government was persecuting the group and its political base instead of negotiating with it.

Two car bomb attacks near Real's Santiago Bernabeu stadium on May 1, 2002 slightly injured 19 people. The stadium was evacuated several times two seasons ago due to false bomb alerts.

With just two matches left to play in the Spanish premier league, Real are level on points with arch rivals Barcelona at the top of the table.