Another threatening letter addressed to oil giant EnCana has been sent to a local newspaper in northern B.C.

The letter was delivered to the Dawson Creek Daily News on Thursday, nine months after the last EnCanada pipeline bombing in the province. It begins by declaring the "time out is over" and that a "long and hot summer is coming."

It was turned over to Mounties, who are working to determine the letter's authenticity. In the mean time, the full document has been released on the RCMP website.

"There's a public safety concern, so the public needs to know what's being said," Sgt. Rob Vermeulen said.

Calgary-based EnCana's B.C. operations were targeted by bomb blasts six times between October 2008 and July 2009. No one was injured in any of the attacks.

During that period, three letters were sent to local newspapers, though one was determined by police to be a hoax. The last authentic letter, sent in July 2009, proposed a three-month truce with police.

Vermeulen said police in Dawson Creek are initiating safety measures, but would not elaborate.

"Our main concern is public safety," he said. "We would hope that the authors of the letter share our concern."

‘This note doesn't contain any DNA'

Thursday's letter accuses EnCana of poisoning the authors' territory, and warns the company not to assume police can catch or stop them.

"The corrupt RCMP and your security personnel are not going to help you as they haven't done it to date," it reads.

It also scolds Mounties for their investigation of Wiebo Ludwig, who was arrested in January and whose northwestern Alberta property was subject to a massive RCMP search for several days.

"It proves their desperation which means that they don't know anything."

Ludwig was convicted of bombing sour gas wells in Alberta about a decade ago and served two-thirds of a 28-month sentence. He has long argued that oil and gas development near his land has harmed the health of his family and livestock.

The letter ends by assuring investigators that no DNA evidence exists on the document.

EnCana spokesman Alan Boras says the oil company is not commenting on the issue at this time.

"This letter is subject to a criminal investigation by the RCMP. It is theirs to address," he said.