UPDATE 1-Canada's TC Energy says NGTL pipeline system resumes normal operations after fire

(Adds quote from TC Energy statement and background in paragraphs 3-4)

By Nia Williams

April 22 (Reuters) - TC Energy's NGTL gas pipeline system in the western Canadian province of Alberta has resumed normal operations after a rupture last week prompted the company to reduce pressure on a segment of the line, TC said in a statement on Monday.

The cause of the rupture, which sparked a wildfire in a remote part of Yellowhead County, is still under investigation.

"We have stood down our Yellowhead County incident emergency response and transitioned to the repair and restoration phase," a TC Energy spokesperson said, adding that the company was continuing to work with regulators.

The NGTL is TC Energy's natural gas gathering and transportation system, which transports gas produced in the Western Canadian Sedimentary Basin (WCSB) to markets in Canada and United States. (Reporting by Nia Williams in British Columbia; editing by Jonathan Oatis)