text: In this picture taken on Monday, Feb. 20, 2017, firefighters survey the scene in the suburb of Rinkeby outside Stockholm. Police in Sweden said Tuesday they were investigating riots that broke out overnight in a predominantly immigrant Stockholm suburb after officers arrested a suspect on drug charges. Spokesman Lars Bystrom said unidentified people, including some wearing masks, threw rocks at police, set cars on fire and looted shops in Rinkeby, north of Stockholm.