MADRID, May 25 (UPI) -- A small truck laden with explosives detonated Wednesday in Madrid, injuring several people.
The bombing was preceded by a warning call to a newspaper from someone claiming to be a member of the Basque separatist group ETA, El Mundo reported in its online edition.
ETA has been has been blamed for more than 800 deaths since beginning its campaign for an independent homeland in the 1960s.
Earlier this month, Spanish Prime Minister Jose Luis Rodriguez Zapatero offered to open a dialogue with ETA, a move conservative opposition lawmakers rejected. Parliament eventually agreed with the prime minister and voted to hold the talks.
Two other bombings in Spain this month that injured three people have also been attributed to ETA.
