Germany's Foreign Minister Guido Westerwelle has made an unannounced visit to Yemen, where five German nationals have been held hostage for six months. Mr Westerwelle will hold talks with President Ali Abdullah Saleh in Sanaa later today and is expected to raise the issue of the seized hostages during the talks. Five Germans, including three children, and a Briton were seized in northern Yemen while picnicking in June last year. Mr Westerwelle is the first Western Minister to visit Yemen since a local Al-Qaeda branch said they tried to bomb a US airliner over Detroit in December.