(BCTV) - A group of Chinese migrants turned violent on Monday at a detention centre in Maple Ridge. Forty-nine of them smashed windows, toilets and set a small fire before extra guards were brought in to stop them. Later in the afternoon, the migrants agreed to talk to Corrections officials, but still want someone from outside the prison to hear their grievances. The migrants have been in custody for nearly a year having arrived on the B.C. coast aboard four separate boats.