Who was arrested over explosion near Vitsebsk KGB?

The Investigative Committee said on November 15 that all the detainees were released and there were no more suspects in the case initiated after an explosion outside the KGB Vitsebsk office. But the question is till open, says local human rights defender Pavel Levinau. He is concerned about the treatment received by those who were held in custody for several hours to several days, and why they are silent, not willing to contact journalists and human rights activists.
Pavel Levinau has been trying to find the detainees from the first days after the explosion on the evening of 11 November:
"I was looking for them through social networks, through their friends. But the relatives and friends of detainees refused to talk and asked not to trouble them. I do not understand: is it indifference or general intimidation of our people? I, as a human rights defender, am very concerned whether the conditions of their detention were normal, whether there was no pressure on the detainees, and if they received medical care, especially as it was said of one of them that he had "external signs of deviations in behavior."
As the criminal case over "hooliganism" is still under investigation, it is important not only that the detainees were released, but in what status they are now, stresses the activist:
"Perhaps they are witnesses in the case. It is possible that some were released on their own recognizance, and some were forced to sign non-disclosure obligations. All this is important – and not out of curiosity, but to know the actual state of things. Since facts of pressure on detainees and other violations of their rights are still common."
If there are no suspects at the moment, it does not mean that they do not appear in the near future, says Pavel Levinau, predicting the probability of the new arrests.