Multiple people were hospitalized following a possible boat explosion in Miami, Florida, that triggered a large-scale emergency response and an ongoing investigation, according to reporting from CBS News and ABC News.

ABC News reported that first responders were dispatched around 12:48 p.m. on May 9 after reports of an explosion in the waters off Miami's Haulover Sandbar. Crews arrived and located multiple victims, with 15 people immediately transported to area hospitals for treatment. Their conditions were not immediately released.

Details about what caused the reported explosion have not been released, and officials have not provided further information on the condition of those injured. An investigation is underway.

USA TODAY has reached out to Miami-Dade Fire Rescue for comment.

This story is developing.