A 42-year-old man and his 11-month-old daughter were killed in a one-vehicle crash in Schuylkill County Saturday.

The crash happened around 10:50 a.m. on I-81 northbound at mile marker 121.

The crash victims have been identified as Alberto Hernandez of Mechanicsburg, Cumberland County, and Anastacia Marie-Carman Hernandez of Mechanicsburg.

State Police say the driver lost control, causing the vehicle to run off the road, crash into a tree and roll onto its roof.

Police say the father was not wearing a seat-belt. The baby was properly restrained in a rear child safety seat, according to police.

Police say several motorists stopped to help, including a physician who rendered first-aid.

The cause of the crash remains under investigation.