BERLIN (AP) - Police have ordered a shopping mall in the western German city of Essen not to open after receiving credible tips of an imminent attack.
    
Police said they had been tipped off late Friday by other security agencies. He declined to provide further details, but Essen police said later that they were questioning a man and had searched his apartment in nearby Oberhausen.
    
The shopping center and the adjacent parking lot stayed closed as about a hundred police officers - many armed with machine pistols and bullet-proof vests - positioned themselves around the compound to prevent anyone from entering the mall. Several officers scoured the interior to bring out early morning cleaning staff.
    
The downtown mall at Limbecker Platz square will be closed for the entire day. The mall is one of the biggest in Germany with more than 200 stores and attracts up to 60,000 people on a regular Saturday, according to the shopping center's website.
    
Germany has been on the edge following a series of attacks in public places over the past year.