The RCMP national security team says it was an explosion that caused an Encana gas pipeline in northern British Columbia to rupture.
It is the fifth time that the company has been the target of a pipeline bomber.
The RCMP launched an investigation after EnCana Corp. reported a gas leak in the early morning hours of Canada Day along their natural gas pipeline near Dawson Creek.
"This blast is considered the fifth in a series of criminally motivated acts that have occurred at EnCana sites in northeastern B.C. spanning 2008 and into 2009, the RCMP said in a statement.
RCMP officers are investigating the leak, but Cpl. Dan Moskaluk had previously said the investigation was being stalled by the severity of the damage.
On Thursday, Moskaluk said Encana is continuing to work on stabilizing and sealing the well head at the site, so that a full forensic and post blast examination can be safely conducted.
No-one was injured as a result of the leak, which poses no immediate threat to the public, the RCMP says.
EnCana is no stranger to attacks. There have been four bombings of EnCana pipelines since October.
In January, EnCana offered up a reward of $500,000 for information leading to the arrest and prosecution of those responsible for bombing its facilities.
EnCana is one of Canada's largest energy companies, owning more than 4,000 producing oil and gas wells in British Columbia.
Earlier this year, a letter was sent to local media and EnCana, calling oil and gas companies "terrorists," and demanding EnCana stop natural gas operations in northeastern B.C.
The RCMP is expected to release an update to the investigation late Wednesday morning.
