Active shooter situation in Maine, city residents told to 'stay inside with doors locked'

A shelter-in-place order has been issued in a Maine city by state police, siting an active shooting situation.

Maine State Police said, in a Facebook post, that there is an active shooting situation in Lewiston, a city of 36,000, 35 miles north of Portland.

Lewiston, Maine, seen from a hill in Auburn. (Brianna Soukup/Portland Press Herald via Getty Images/File)

Authorities told residents in Lewiston to "shelter in place" and to "stay inside your home with the doors locked."

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Police said that local law enforcement and state police are investigating "two locations right now."

Police said that local law enforcement and state police in Maine are investigating "two locations right now." (Russ Dillingham/Sun Journal via AP/File)

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It is unclear whether people have been injured.