POLICE are warning Halton residents to be on their guard following reports of suspicious phone calls.

The caller claims to be an officer from the Metropolitan Police, who is investigating an incident in London and asks the person to call back on 999.

A Cheshire Police spokesman said: “We are unsure of the motivation for the calls, but we do believe it is an attempt to gain access to personal information.

“Cheshire Police advice is to not to respond to these calls, a police officer would never ask you to call back on 999.

“If in doubt ask for the officer′s name, collar number and station and then hang up. 

"Use a different phone as the caller may still be linked to yours. Call 101 to check the identity of the officer.”

For more advice and information about fraud visit the Cheshire Police website cheshire.police.uk or Action Fraud website actionfraud.org.uk.