A construction worker died Wednesday after a valve ruptured and struck him in the chest in San Ysidro, a spokesperson for the Occupational Safety and Health Administration (OSHA) confirmed.
The incident occurred on the 5700 block of Camiones Way near the U.S.-Mexico border and Interstate 5.
According to the San Diego Fire-Rescue Department (SDFD), medics were called out around 10:52 a.m.
A 2-inch hose hit the 52-year-old worker in the chest and knocked him off the platform. When medics arrived on the scene, the man was not conscious, SDFD officials said.
San Diego police also responded to the scene.
OSHA spokesperson Luke Brown said the employee worked for Earth Tech Well Drilling, a subcontractor for Atkinson Clark.
NBC 7 reached out to Atkinson Clark for a statement but has not heard back yet.
At this time, OSHA is investigating both companies.
According to previous OSHA records, Atkinson Clark was investigated for two construction accidents -- in Westminster and Foothill Ranch.
No other information was available.