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4 Marines reportedly killed by gunman in Chattanooga

Four Marines were reportedly killed in Chattanooga, Tennessee, on Thursday in multiple shootings that appeared to target military sites, an official told The Associated Press. The alleged gunman has also been reported dead, and at least one police officer is said to be injured. Not much has been confirmed yet, including the identities of the shooter or the victims.

Many areas of Chattanooga were locked down Thursday, The Associated Press reports, including schools, roads, a mall, and other buildings.

This is a breaking new story. We'll update when we know more.

UPDATED 3:17 PM EST: Chattanooga Mayor Andy Berke confirmed the deaths in a Thursday press conference. He also said the incident is being investigated as an act of domestic terrorism.