Canada police probe new letter linked to bombings

VANCOUVER, British Columbia, July 15 (Reuters) - Investigators are worried about the content of a new letter believed to be linked to a series of pipeline bombings in western Canada, police said on Wednesday.

It is thought to be the second letter sent to businesses and media in northeastern British Columbia from the saboteur responsible for the six bombings that began last fall.

The most recent blasts were in early July. There have been no injuries from the explosions.

The Royal Canadian Mounted Police confirmed that a letter had been received by an unnamed business on Wednesday, but refused to release details about what it said.

"We are taking it seriously. The contents are concerning," said RCMP spokesman Sergeant Tim Shields.

Local media reports said the letter had been received by the daily newspaper in Dawson Creek, which has also declined to release the letter's content until told to do so by the police.

A letter sent to the media before the blasts began last fall warned EnCana Corp (ECA.TO)., a major energy producer in the region around Dawson Creek, British Columbia, to stop drilling and leave the area.

All of the bombings have targeted pipelines and related energy facilities owned by EnCana.

There have been no injuries from the explosions, but several of the blasts have caused leaks of "sour" gas, which can be fatal if breathed even in small amounts.

(Reporting Allan Dowd, editing by Vicki Allen)