German authorities are investigating a series of car accidents that left several people injured on a Berlin motorway on Tuesday evening as an Islamist attack, prosecutors' spokesman told Focus magazine on Wednesday. 'According to the current knowledge, it was an Islamist-motivated attack,' the spokesman was quoted as saying. He added that there were also indications that the 30-year-old suspect with an Iraqi citizenship had psychological problems. A spokesman for the Berlin public prosecutors was not immediately available for comment.