Austria tightens border controls as Hungary frees convicted people smugglers

Budapest blames EU for decision to release foreign detainees provided they leave country within 72 hours

Austria has stepped up security on its borders after Hungary released convicted people smugglers from its prisons in a row that has also raised tensions with Brussels.

Following reports that hundreds of detainees may have been released on Monday provided they left the country immediately, Hungary's state secretary of the interior ministry, Bence Retvari, blamed the European Union for the move.