NEW : New Democracy party fails to form coalition , hands over to leftist ruling coalition . Syriza had refused to form a unity government after Bloody Sunday . It delivered a strong rebuke to parties that supported harsh austerity measures . Greece should stand by the bailout terms , a European Union spokeswoman says .
NEW : New Democracy party fails to form coalition , hands baton to leftist Syriza coalition . Syriza had refused to join a unity government after elections Sunday . Voters delivered a strong rebuke to parties that supported harsh austerity measures . Greece should stand by the bailout terms , a European Commission spokeswoman says .