Some 28 people are recovering in hospital after being attacked by a man wielding a knife at the opening of Berlin’s new railway station. Police said a 17-year old teenager ran down the street stabbing people before being arrested. At least four people hurt are said to be in a serious condition.It happened just a short distance from the showpiece main station which had been inaugurated by Chancellor Angela Merkel a few hours before. Huge crowds had turned out to watch a firework display. The five-storey glass station opened just in time for the football World Cup in Germany, starting in two weeks’ time. Located near where the Berlin wall used to stand, it is Europe’s biggest station and cost 700 million euros. More than 350,000 passengers per day are expected to use the new station.