Police investigating a stabbing attack on passers-by in Switzerland on Wednesday have not been able to establish the identity of the detained attacker or his motive. The alarm was raised on Wednesday afternoon, when an emergency call was received by the police in the small town of Zofingen, around 50 kilometres south-east of Basel. A man was stabbing passers-by indiscriminately and had injured several people. The attack began at the train station, then moved on towards an education centre. Security and emergency services were quickly on the scene, the area around the station was cordoned off a…