Brownsville Fire Department Chief Lenny Perez says the men became ill following a carbon dioxide leak. Perez says all seven workers were in stable condition when they were transported to a hospital Thursday afternoon.
Names of the men and further details on their conditions were not immediately available. The accident happened at Keppel AmFELS at the Port of Brownsville.
Company officials say the men are employed by a contractor and were working on a fire suppression system on a vessel.
Keppel AmFELS builds and services mobile drilling rigs and platforms.