[JURIST] British officials are seeking the return of Hamdi Isaac, the suspected fourth bomber in the July 21 London bombing attempts [JURIST report]. Isaac, an Ethiopian who was living in the UK under the name Osman Hussain and claimed to be of Somali origin, was arrested in Rome on Friday [JURIST report], a move which led the British government to consider tightening border controls. He was arrested under a European Union arrest warrant [EU backgrounder] after authorities traced his cell phone calls. The EU warrant is a new provision designed to speed the return of suspects to countries where they are wanted. A decision on his extradition could take up to two months. Bloomberg has more.