MONTREAL — The Montreal Alouettes were forced to leave their practice field because of a gas leak at State Hebert on Monday.

The team returned to Olympic Stadium to resume practice indoors.

They were about an hour into practice when a strong smell of natural gas wafted into the stadium.

A spokesman said the team was told to leave the area by the fire department.

A crew was working on what appeared to be a gas main at the adjacent Roberto Luongo Arena.