EnCana workers were still repairing a wellhead damaged by the Canada Day explosive attack on their natural gas network when they heard a loud bang Saturday afternoon.

Less than a kilometre away they found a section of 30-centimetre pipeline that had apparently been targeted the same way, briefly leaking gas until the pressure drop triggered automatic safety shutoff valves.

Residents near the northeast B.C. village of Pouce Coupe also heard the noise and called police, who joined the EnCana officials at the latest site of their widening investigation. Evacuating and securing the sixth bombing site since the attacks began last fall, they determined that there were no injuries. Air testing equipment at the nearest home 2.5 kilometres away showed none of the traces of hydrogen sulphide present in the gas being piped.

With a fresh site to investigate, two more officers have been assigned to the Dawson Creek RCMP detachment, joining dog teams and specialists in explosives disposal, forensic identification and national security. Earlier bombings went undetected for several days, and the quick response from citizens should help the investigation, said RCMP Cpl. Dan Moskaluk.

"We are thankful that the community took this cautious step, which again displays the horrible stress that those responsible for these criminal acts are inflicting on the communities of Pouce Coupe and Dawson Creek," Moskaluk said.

Anyone with information on the bombings is asked to call the RCMP's dedicated tip line at 1-866-994-7473, the Dawson Creek detachment at 250-784-3700, or their local police.

A website with photos and details of the bombing incidents is at www.dawsoncreekbombings.com.