Police seized 50 wraps of heroin and this terrifying machete with a foot-long blade when they arrested a 16-year-old boy on suspicion of drug dealing.

The raid is the latest to be carried out in Operation Gravity, which is targeting violent drug gangs in King's Lynn, Norwich and Great Yarmouth.

One officer tweeted: 'Male arrested in KL with 50 wraps of suspected heroin/cocaine. Also seized was this weapon!#OpGravity.'

Norfolk police later said: 'Officers attended an address in Persimmon, Fairstead, at approximately 2.15pm on Wednesday, March 15, and arrested a 16-year-old boy on suspicion of intent to supply a Class A drug.

'A quantity of Class A drugs were seized at the address, along with cash and drug paraphernalia.

'The 16-year-old has since been released on police bail pending further enquiries until Wednesday, May 3.'

Police have been cracking down on heroin and crack cocaine dealers from London, Peterborough and other cities, who think that Norfolk is a soft touch.

In King's Lynn, so-called 'cuckoo' gangs have been taking over the homes of vulnerable addicts to deal from.

Levels of drug-linked violence have spiralled to levels unseen in Norfolk as turf wars break out and debts are enforced. One user was stabbed over £20.

Targeting gangs was made a force-wide priority in December, when Operation Gravity was launched.

Norfolk police and crime commissioner Lorne Green has said he is 'heartened' at his officers' determination to stem the flow of drugs and violence into the county.

Since December, police made have arrested more than 100 people in King's Lynn, Norwich and Great Yarmouth, and stops on suspect vehicles.

Most alleged gang members are aged in their teens and early 20s, with the majority coming from London.

Class A drugs with a street value of more than £10,000 and £25,000 in cash have been seized from offenders, along with knives and other offensive weapons.

Anyone with any information about drug dealing in their area should contact Norfolk Police on non-emergency number 101.

Alternatively information can be left anonymously with Crimestoppers on 0800 555111.