A deadly accident shut down all lanes of highway 50 Sunday morning in Dayton. Â
Two people died at the scene; one other has life threatening injuries and was flown by care flight to a hospital. Â
The Lyon County Sheriff's office says just before 7:30 a.m. a semi-truck struck two other vehicles at the intersection of Hwy 50 and Traditions Parkway. Â
Investigators say the driver of the semi may have fallen asleep. Â
