In 1847 the home of Don Pacifico, a Gibraltarian merchant living in Athens, Greece, was attacked by an anti-Semitic mob which included the sons of a Greek government minister. The Greek police did not intervene in the attack, despite being present. Because Don Pacifico was a British subject, the British government expressed concern. In January 1850, Palmerston took advantage of Don Pacifico's claims on the Greek government, and blockaded the port of Piraeus in the kingdom of Greece. As Greece was under the joint protection of three powers, Russia and France protested against its coercion by the British fleet.