Some Metra trains delayed after gas leak near Millennium Station

CHICAGO (WLS) -- There are some delays on the Metra Electric line Wednesday morning, after a gas leak was reported near Millennium Station, the commuter rail said.

Inbound and outbound trains were halted about 7:45 a.m., Metra tweeted.

They started moving again just after 8 a.m.

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Delays of 15 to 20 minutes should be expected, Metra said.

It was not immediately clear what caused the gas leak.

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The Metra Electric line takes riders from Chicago's Loop to the south suburbs.

Peoples Gas said in a statement, "A Peoples Gas crew has responded to the odor at Millennium Station and is working with CFD to determine the source of the odor. As of right now, it is unknown whether the source of the odor is natural gas."

The Chicago Fire Department gave the all clear, and the odor had dissipated by about 9:45 a.m., Peoples Gas said.