u/Diligent-Comb-6276

This evening I opened my door to the cops informing me they had a search warrant and that my flatmate had been arrested. They seized their phone and laptop. I was not informed by the police for why they was arrested and they arrived home just before the police left so they were given the search warrant. They are clearly distressed about the ordeal, but I would like to know the reason behind why this happened. Is this something I can call the police about? Does the fact that the tech was seized lean towards something in particular?