Members of Spain's royal family and the country's top political leaders have attended the funeral of two civil guard officers killed in Thursday's bombing on the Mediterranean island of Mallorca.

Crown Prince Felipe, his wife Letizia, Prime Minister Jose Luis Rodriguez Zapatero and opposition Popular Party leader Mariano Rajoy attended a funeral Mass at the cathedral of Palma de Mallorca Friday.

A bomb placed under their police vehicle killed the two officers.  Government officials blame the attack on the armed Basque terrorist group ETA, and they have announced a search for two Basque suspects seen in the city this week.

Thursday's attack came on the eve of Friday's 50th anniversary of the founding of ETA.  Security forces are on maximum alert.

The attack was the second this week, following a car bomb that wounded more than 60 people in the northern city of Burgos Wednesday.

ETA has killed more than 825 people since it launched its terrorist campaign in the late 1960s to create an independent Basque state in northern Spain and southwestern France.

Some information for this report was provided by AFP, AP and Reuters.