Awwal 09, 1432 H/Feb 12, 2011, SPA -- Police said Saturday they had thwarted a bomb attack on railway signals on the northern edge of Berlin, seizing and defusing two explosive devices in cable ducts near the town of Oranienburg. The bombs appeared to be aimed at setting the signal cables on fire to halt train services, dpa reported. Police suspect radical leftists opposed to the railways transporting nuclear waste were behind the attempted attack. A witness tipped off police Friday that she saw someone tampering with the wiring. In November, a radical anti-nuclear group claimed responsibility for a signals fire caused by similar devices that disrupted suburban train services in the capital. Anti-nuclear demonstrators have increased their protests with a 56-ton waste shipment expected Wednesday from a former reprocessing plant at Karlsruhe in the south of the country to a storage site at Lubmin on the Baltic coast. -- SPA