GIULIA PARAVICINI SCORES and possibly hundreds of labourers were stabbed and hacked to death in Ethiopia's Tigray region, rights group Amnesty International has said, as federal troops claimed major advances in their offensive against local forces. "This is a horrific tragedy," Amnesty said in a statement, citing witnesses as blaming local rulers, the Tigray People's Liberation Front (TPLF), for the killings, which it said took place two days ago. Earlier, Ethiopian Prime Minister Abiy Ahmed had accused his foes of committing atrocities during a week of fighting that threatened to destabilise the Horn of Africa. Abiy said the Ethiopia military…