The 11 injuries that came after a possible boat explosion in Miami may be tied to the boat's hatches that were allegedly not open when the ignition was started, an eyewitness told local media outlet CBS12.

Miami-Dade Fire and Rescue Battalion Chief Juan Arias said first responders were dispatched around 12:48 p.m. on May 9, USA TODAY reported, after reports of an explosion in the waters off Miami's Haulover Sandbar.

Crews arrived and located multiple victims. Eleven people were treated at the scene before being transported to area hospitals. Arias told USA TODAY some of the victims sustained burn injuries, though he did not comment on the full extent of their conditions.

Officials told USA TODAY May 10 the cause of the possible explosion is is under investigation.

Ongoing investigation: Multiple people injured in possible boat explosion near Miami sandbar