As Lebanon’s PM Hassan Diab picked through the rubble in his Beirut office, he promised that those responsible for a devastating warehouse explosion that destroyed much of the city would “pay the price.”

A devastating explosion rocked Beirut on Tuesday evening, killing more than 70 people and injuring at least 2,700. Large swathes of the Lebanese capital were damaged by the blast, including the offices of Prime Minister Hassan Diab.

Pictures of the damage at Lebanon’s PM Hassan Diab’s office

Diab righted fallen flags and picked his way around collapsed wooden doors, and as he addressed the nation on Tuesday night, he promised retribution for the tragic blast.