Hungarian police halted a train packed with migrants bound for the Austrian border and tried to force them to disembark in a town with a detention camp on Thursday, a confrontation that has become a focus of Europe's migration crisis. After shutting migrants out of the main train station in the capital Budapest for two days, authorities allowed exhausted and confused migrants to board a westbound train. Hundreds crammed aboard clinging to doors and squeezing their children through open carriage windows. But instead of proceeding to the Austrian border, the train was stopped just west of Budapest in the town of Bicske, where Hungary has a migration reception center, and police ordered the migrants off.