STOCKHOLM - Sweden's security police (SAPO) raised on Wednesday their terrorist threat assessment by one step, to four on a scale of five, following the attacks in France. 'One of the reasons for the increase is that the Security Police have received concrete information and made a judgement that we need to act within the framework of our counter-terrorism operations,' SAPO said in a statement. Level four means that there is a high probability that 'persons have the intent and ability to carry out an attack'.