STILLWATER, Okla. — Authorities are looking for a mother and two children who were last seen in Payne County on Thursday morning. 

An amber alert has been issued out of Delaware County. Authorities are searching for 2-month-old Maxwell Keener and 20-month-old Adelyn Keener. The children are believed to be with their mother, 31-year-old Sarah Jane Lewis.

Lewis is a white female, 5-foot-8, brown eyes and brown hair. She is driving a 2002 silver Infiniti with Oklahoma license plate 107-CRF. The mother and her children were last seen in Payne County.

A child endangerment warrant has been issued for the suspect. Authorities say Lewis has used drugs in front of her children, and they are believed to be in immediate danger in her presence. If you have any information, dial 911 immediately.