A worrying WhatsApp scam has been reported by frustrated users – with people locked out of their accounts after being taken in by the trick.

People say they have received messages claiming to be after a six-digit code – with those who do get it urged to delete it.

Victims receive a message seemingly from a friend which states: “Hello, sorry, I sent you a 6-digit code by mistake, can you pass it to me please? It’s urgent?”

In fact, the Express reports, a code, which is sent alongside the message, gives criminals access to your account.

Whenever anyone upgrades their handset, WhatsApp generates a six digit code so you can get hold of messages archived in your chat.

This is sent in a text message.