ETA has broken ceasefire by blowing up a van with around 100Kg of explosives in the carpark at Barajas airport. There's one missing person, who was sleeping in his car at the moment of the explosion. The president is scheduled to speak this evening at 6pm to explain what measures he's going to take in the face of it.
Personally, I think it's sad, but it was bound to happen sooner or later. ETA never negotiates, they demand, and if you don't agree to their demands, they blow people up. It's the only type of negotiation they have understood in the past 30-something years, and they weren't going to change now.