It happened around 11:45 a.m. on I-35 South near Cassin Road.
Two 18-wheeler trucks were involved in a major crash on the southwest side of San Antonio Thursday.
It happened around 11:45 a.m. on I-35 South near Cassin Road.
Police say that two people were taken to the hospital with critical injuries.
No word on what may have caused the accident.
This is a developing story.