Police in Namibia have intercepted a suspicious object with a detonator and a running clock in luggage on an Air Berlin plane en route from the country's capital, Windhoek to Munich. Germany's Federal Crime Office (BKA) said it was not clear if the object found during loading of the Airbus jet yesterday was an ignitable explosive. Germany stepped up security measures after saying it had received intelligence pointing to a planned attack in the country towards the end of this month. Security was stepped up at potential targets such as train stations and airports.