Shale gas protesters and RCMP trying to enforce an injunction are clashing in Rexton, N.B., leading to at least five police vehicles being set on fire and the arrest of a First Nations chief. 
'We urge all sides not to resort to violence as history has proven these tactics are not productive.'- Chief Gabrial Atwin, Kingsclear First Nation
In a news release, the RCMP said more than 40 protesters have been arrested for various offences including firearms offences, uttering threats, intimidation, mischief and for refusing to abide by a court injunction.
The RCMP said at least one shot was fired by someone other than police. that Molotov cocktails have been thrown at police and at least five RCMP vehicles have been destroyed by fire.  Police are also investigating suspected explosive devices at the scene,
"The RCMP has worked diligently with all parties involved in hopes for a peaceful resolution. Those efforts have not been successful. Tensions were rising, and serious criminal acts are being committed," said RCMP Const. Jullie Rogers-Marsh in a news release.
"There have been threats made to employees who were working with a private security firm at the site, as well as firearms offences, incidents of intimidation, mischief and other criminal behavior. For those reasons, and to ensure public safety, police action was required."