They have launched an investigation into the blaze, which they are treating as willful firerasing. Detective Constable Stephen Knox, Paisley CID, said: There are a number of companies, including an engineering firm and two charities, in the building, but, at the moment, we don t know why this particular building was targeted. Although the building is on a side street, there are a number of houses in the area where someone may have seen or heard a noise around the time that would have seemed suspicious. The premises also backs on to a dual carriageway, Gallow Green Road, so if you were in the general area and maybe have any dash-cam footage from around that time, or any information, then we would like to hear from you.