02/03/2015 09:58 EST | Updated 04/05/2015 05:59 EDT

Mount Polley spill: Search warrants executed at Imperial Metals

The B.C. Conservation Service executed search warrants at the Mount Polley mine and the Vancouver offices of its owner Imperial Metals Tuesday night, in relation to the spill of 25 million cubic metres of waste from the mine's tailings pond last August.

Insp. Chris Doyle with the conservation service said the search warrants were issued to support a joint investigation by the B.C. Conservation Service, the RCMP, Environment Canada and Fisheries and Oceans Canada.

Imperial Metals owns and operates the Mount Polley open pit copper/gold mine located in B.C.'s Cariboo region near the small town of Likely.

Last week, an independent investigation found the breach of the dam containing the Mount Polley mine tailings pond was due to an unstable foundation, likening the massive embankment to a "loaded gun."

"The Mount Polley investigative team continues to use a myriad of investigation techniques in an effort to gather the best evidence to be presented to provincial and federal prosecutors," said Doyle.

"The investigative techniques utilized may include, but are not limited to, the interview of witnesses, gathering of technical evidence and the execution of search warrants."

More to come