Yes, they were young girls.
Mikelle Biggs was standing outside her house, she was seen there by her sister. She was 11.
April Jones was a five year old girl in the UK. She was seen getting into a vehicle. A man was arrested and convicted, and eventually fragments of bones were found in the fireplace of his house.
Mikelle Biggs was standing outside her house, she was seen there by her sister. She was 11.
April Jones was a five year old girl in the UK. She was seen getting into a vehicle. A man was arrested and convicted, and eventually fragments of bones were found in the fireplace of his house.
The two females whose bodies were never found were girls -- Mikelle Biggs(age 10) in 1999 and April Jones(age 5) in 1996.
And yes, you are correct that the public has no info on when/whether SM was seen riding her bike that day.