The U.S. and Colombia cannot ignore Venezuelan President Nicolas Maduro’s blaming of them for the apparent assassination attempt against him on Saturday. That attack apparently involved explosive-laden drones being detonated in proximity to Maduro, who was unharmed.

In response, Maduro stated he had “no doubt” that President Juan Manuel Santos of Colombia was culpable for the attack. Maduro also blamed the U.S. and the Venezuelan opposition promising “maximum punishment! And there will be no forgiveness.” On Sunday, President Evo Morales of Bolivia echoed Maduro’s claims on Twitter.