Sixteen people were injured in a boat explosion at a marina in the Lake of the Ozarks in Missouri, authorities said.
Photos posted online by authorities showed shattered glass on the boat and other damage that appears to have been caused by the explosion.
Most of those injured were on the boat, authorities said.
At least three passengers were ejected from the boat, the report said.
The injuries range from minor to moderate, the highway patrol said in its post.
Eleven people, including a 6-year-old girl, were treated on the scene and released, according to the report, while five others were taken to a hospital.
An investigation into the incident is ongoing.
Lake of the Ozarks, a popular summer vacation spot in the Midwest, boasts more than 1,100 miles of shoreline.