Protesters set fire to the British and Israeli national flags as they break in to the British Embassy during an anti-British demonstration in the Iranian capital. (FarsNews/Getty Images)

The Post’s Thomas Erdbrink reports that a European diplomat returned to the ransacked grounds to search for the dog. The pooch was found alive, but the damage to the buildings was extreme. “The place had been systematically ransacked, paintings were destroyed and furniture was broken,” the diplomat said. “We have concluded that the attack had been extremely well coordinated by the authorities.”

Around 300 protesters broke into the building, tore down paintings and set the British flag on fire.