London police have a significant presence in the area of Elm Street and Pine Street.
Officers responded just before 7 a.m. after receiving reports of gunshots in the area.
Few details are known, but police say they have several people in custody as they continue to probe a weapons investigation involving a long gun.
They say there is no indication that this incident is related to a weapons investigation Friday that drew a large number of police cruisers to an apartment complex on Gore Road earlier in the morning.
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Elm Street is currently closed from Pine Street to Rosewood Avenue.
Police say the investigation is in its early stages and are asking people to avoid the area.
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