[FILE - In this Dec. 20, 2016 file photo a police officer lights a candle in Berlin, Germany the day after a truck ran into a crowded Christmas market nearby. German prosecutors say they've detained a Tunisian man they think may have been involved in last week's truck attack on a Christmas market in Berlin. Federal prosecutors said Wednesday Dec. 28, 2016 the 40-year-old was detained during a search of his home and business. (AP Photo/Matthias Schrader,file)]BELGRADE, Serbia (AP) — The Latest on Europe's response to the influx of asylum-seekers and migrants (all times local):