A natural-gas pipeline in northeast B.C. has been bombed for the fourth time in three months, RCMP said yesterday.

The explosion did not cause a gas leak, but did damage a metering shed. No one was injured in the blast that was discovered Sunday by EnCana gas-line workers at a well­head near the hamlet of Tomslake, 30 kilometres south of Dawson Creek.

The RCMP’s integrated national security enforcement team is invest­igating the explosion, the most recent in a string of bomb­ings on gas infrastructure in the Peace River.

On Oct. 7, three letters were mailed from the Dawson Creek Shoppers Drug Mart to EnCana and two newspapers, one in Dawson Creek and one in Chetwynd.

The letters, which were addressed to EnCana and other “oil and gas interests,” called for the termination of operations near Tomslake by Oct. 11.

The first of the bombings is believed to have occurred the next day, Oct. 12.

Two more bombings took place on Oct. 16 and 31. Two were on EnCana pipelines and one was on a wellhead. The explosions all occurred early in the morning.

Investigators took the unusual step of creating a website — dawsoncreek-bombings.com — with information about theexplosions.

They also released photos from the Shoppers Drug Mart surveillance video of people who mailed letters on Oct. 7.