Authorities in northern Spain say four small bomb explosions set off by the armed Basque separatist group ETA have wounded three people.
All of the blasts occurred before dawn Sunday near business or industrial sites in Guipuzcoa province.
Two Basque police officers and a security guard developed breathing problems when one of the explosions, at a chemical plant, released a toxic cloud.
Today's attacks follow the announcement that Spain's ruling party will seek parliamentary support to open talks with ETA, if the militants agree to disarm.
ETA is blamed for more than 800 deaths since the late 1960s, when it began fighting for creation of an independent Basque state in southwestern France and northern Spain. The United States and the European Union have both condemned ETA'S terrorist tactics.
Some information for this report provided by AFP, AP and Reuters.