Two men were pronounced dead after they were found unresponsive in a water tank in Parker County on Friday.
The workers were discovered in a water tank in the 12000 block of Aledo Road in Fort Worth at around 5:15 p.m.
Rescue crews and a CareFlite helicopter pulled the two unresponsive victims from an underground concrete vault.
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The men were pronounced dead shortly later. The Tarrant County Medical Examiner will determine the cause of death.
Investigators believe the two workers were performing routine checks of water infrastructure in the area.
Their coworkers called the police when they got no answers from them.
