BERLIN: A suspected bomb in a suitcase checked in on a German-bound plane was intercepted in Namibia, Germany's Federal Crime Office (BKA) said Thursday, one day after Berlin raised its terror alert level. The BKA said the suspicious baggage had been seized Wednesday at the international airport in Windhoek before it was due to be loaded on to an LTU/Air Berlin flight to Munich. “A subsequent X-ray (of the luggage) revealed batteries that were attached with wires to a detonator and a ticking clock,” it said in a statement. “Only the ongoing forensic investigation will show whether this was a live explosive.” Passengers on the flight as well as all luggage in the hold and the aircraft itself underwent subsequent checks before the plane was given clearance to take off. “They arrived in Munich safe and sound last night,” the statement said. The BKA said it dispatched officers in South Africa to Namibia, a former German colony, to aid in the investigation and planned to send further experts to examine the suspected bomb. The German government hiked security measures at rail stations, airports and other public spaces Wednesday following a tip-off from a “foreign partner” about an attack by extremists planned this month. “Since the middle of 2010, the security services have noticed increased indications that the terrorist organization Al-Qaeda has been planning attacks in the United States, in Europe and in Germany,” Interior Minister Thomas de Maiziere said. – Agencies Citing security sources, the Tagesspiegel daily reported Thursday that the United States had told Berlin that between two and four Al-Qaeda operatives were on their way to Germany and Britain to attempt attacks. Among the targets Tagesspiegel cited were Germany's popular Christmas markets. The paper added the militants were expected to arrive in Germany on Nov. 22. Last month authorities discovered two US-bound parcel bombs originating from Yemen, one of which went through Cologne airport in western Germany. And on Nov. 2, an explosive device arrived by post at Chancellor Angela Merkel's office in what De Maiziere said was likely a suspected attack by Greek radicals. The head of Germany's police union, Konrad Freiberg, warned Thursday there were “security deficits” in the country and that it was underprepared for a terrorist attack. “We have missed a few steps along the way and there are security deficits that we have drawn attention to,” he told the Hamburger Abendblatt daily. Germany, which opposed the 2003 US-led invasion of Iraq but has nearly 5,000 troops in Afghanistan under NATO command, has never experienced an attack by militants on its own soil. But authorities say the militants scene is large and dangerous. The closest it has come to an attack was in July 2006 when militants placed suitcases with homemade bombs on two regional trains at Cologne's main station. They failed to detonate, averting an almost certain bloodbath. Three of the Sept. 11, 2001 hijackers including their ringleader Mohammed Atta, who flew the first plane into the World Trade Center, lived in the northern German city of Hamburg before moving to the United States. – Agence France