At about 3 p.m., the Liberty County Sheriff's Office responded to reports of two people "passed out" in a car near County Road 5260 and County Road 5200.
When deputies arrived they found the two teens dead from multiple gunshot wounds in a light blue Honda sedan.
LCSO said the victims appeared to be approximately 15 or 16 years old but did not release their identities.
So far, the suspect is unknown, deputies said.
This is an ongoing investigation.
SEE ALSO: Investigators determining teen's death after fatal shooting inside of car in north Harris County
Teen found dead in car at intersection in N. Harris Co., deputies say