The PSNI has requested assistance from police forces in Great Britain following violence in Ballymena, a senior officer has said. <br />Seventeen police officers were injured during a second night of violence in Ballymena. During the course of the disorder, officers discharged a number of plastic baton rounds and the water cannon was also deployed in an attempt to disperse the crowds. Report by Gluszczykm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
