A second gas leak this month has shut down part of a Halifax neighbourhood.

Heritage Gas workers were called to a ruptured gas line on Knightsridge Drive in Clayton Park this morning.

The company got a call about the leak at 9:20 a.m. and was able to locate it, and turn off the line at 11 a.m., company spokesman John Hawkins said.

"There was a tie-in being done between some new and some existing pipeline and it was during that work that a piece of live pipeline was struck and that resulted in the release of gas," he said.

An investigation is being done and a report will be sent to the Nova Scotia Utility and Review Board, he said, adding it is only the second time since 2008 that Heritage Gas was responsible for a leak in the province.

Natural gas customers in the area were expected to have supply restored by 1 p.m.

Halifax firefighters are shown at the scene of a gas leak in Clayton Park, near Dunbrack Street. (Craig Paisley/CBC)

After workers located the gas line rupture on Knightsridge Drive, they clamped off the line the corner of Flamingo Drive and Trailwood Place before repairing the break.

By late morning, Halifax Fire and Emergency, which was monitoring the scene, tweeted that the line had been clamped and air sample were not showing any evidence of natural gas.

A gas leak at a building on the corner of South and Hollis streets forced the evacuation of five city blocks on Nov. 6.

An excavation company was demolishing a South Street building at the time of the leak.

Wednesday's leak shut down Knightsridge Drive from Dunbrack Street to Flamingo Drive for part of the morning.

There was a heavy smell of gas in the area and a hissing sound could be heard from the area of the leak.