Official of Spanish A-plant killed; Basques suspected

Suspected Basque separatist guerrillas shot and killed the director of a nuclear plant under construction here in an attempt to stop its coming into operation. Last year ETA (Basque Homeland and Freedom) guerrillas killed the plant's chief engineer and sent death threats to other technicians working on the Lemoniz project, a twin 930-megawatt reactor 10 miles from Bilbao, which ETA says is too close to densely populated areas. The Spanish government has rejected a call from Basque authorities for a regional referendum on the Lemoniz plant.