FEARS are growing for a missing teenager who disappeared after reportedly meeting an “unknown person”.

Alfie St John, 16, vanished after travelling from Southampton to Liverpool, and was last in touch with his family on Friday afternoon.

In an appeal on Facebook, his mum Laura said she was “worried sick that something bad’s happened to him”.

She added that Merseyside Police have launched a search.

Laura’s post said: “I’m worried sick that something bad’s happened to him! Me and my family and friends have called him non-stop.

“This is not like Alfie to not be in contact everyday.

“Merseyside Police are looking for him. But if any could share this to any Liverpool websites would be appreciated.

“Please help to find him I just need to know his safe many thanks.”

The Sun has contacted Merseyside Police.