Spanish Prime Minister Pedro Sánchez on Wednesday expressed "full support" for his predecessor José Luis Rodríguez Zapatero after a court placed his Socialist ally under investigation for alleged influence peddling.

A Spanish court is investigating former Spanish Primer Minister José Luis Rodríguez Zapatero for alleged influence peddling and other possible crimes.

Zapatero's office in Madrid was being searched alongside three other premises, the court said in a statement.