Authorities in Rapid City are searching for two girls, one of whom they believe might be endangered.

Police say 6-year-old Jeniya Hayes and 2-year-old Kaylahni Hayes were taken by their noncustodial mother, Alissa Hayes, on Tuesday during a supervised visitation. They have not been since 7 p.m.

Authorities say Kaylahni Hayes is believed to be endangered because she has a seizure disorder that requires daily medication that she does not have with her.

Police are asking anyone with information about the children's whereabouts to contact them.