Maine Governor Janet Mills will join state and SignalHublocal public safety officials in Lewiston in a news conference Thursday morning in the wake of two shootings that killed at least 16 people Wednesday night.

Authorities say the shooting started just before 7 p.m. at Schemengees Bar and Grille and Sparetime Recreation, a bowling alley.

School districts canceled classes and authorities warned residents in and around Lewiston to stay inside and lock their doors as investigators launched a massive search for Robert Card, 40, who police identified as a person of interest in the Wednesday rampage.

Card is considered "armed and dangerous," police say.

A vehicle believed to have been driven by Card was found overnight in Lisbon, about eight miles away from Lewiston, according to Maine Department of Public Safety Commissioner Mike Sauschuck. The shelter-in-place order has been extended to the town of Bowdoin and Lisbon while Lewiston and its twin city, Auburn, remained under lockdown Thursday.

Maine shooting live updates:Latest news on manhunt for Robert Card, a person of interest

The White House said President Joe Biden had been briefed on what’s known so far about the mass shooting and will continue to receive updates.

"The President spoke by phone individually to Maine Governor Janet Mills, Senators Angus King and Susan Collins, and Congressman Jared Golden about the shooting in Lewiston, Maine and offered full federal support in the wake of this horrific attack," the White House said in a statement.

Watch livestream: Press conference on Lewiston, Maine mass shooting

You can watch the press conference below or on USA TODAY's YouTube page. It is scheduled to begin at 10:30 a.m. ET.

Contributing: Christopher Cann, Minnah Arshad, Thao Nguyen & Vanessa Arredondo, USA TODAY