Police arrested a radical Muslim cleric Thursday on suspicion of preparing or instigating “acts of terrorism,” a move that could delay U.S. attempts to extradite the suspect for allegedly trying to establish a terrorist training camp in Oregon and on other charges. The arrest of Abu Hamza al-Masri, who already was being held in a British prison on the U.S. warrant, suggests British authorities plan to pursue charges against al-Masri under British law. Al-Masri was taken to a central London police station for questioning by anti-terrorism officers, police said. If British authorities formally charge al-Masri, the case has to be resolved before any extradition proceedings, according to officials. British law bars extradition to countries that might execute a suspect, and officials have made clear they would not send the Egyptian-born al-Masri to the United States unless it rules out the death penalty. Full Story