Broward County sheriff's officials say the three were found unresponsive after emergency workers received a call early Tuesday about the leak in an argon gas container. Argon is a colorless, odorless gas. Although it's not toxic, it can cause suffocation in a contained space.
The shipping container is in a secured area of the Fort Lauderdale port.
The medical examiner's office will determine the exact cause of death. The victims have not been identified.
