Thousands of pounds worth of class A drugs and a knife have been seized in Norwich.

Officers arrested four people in connection with the find, which was part of the force's Operation Gravity crackdown on county lines drug dealing.

A Norwich police spokesman said: "The drugs and knife were seized at around 11.30am and we believe the drugs to be cocaine and heroin."

The value of the drugs, found in the Riverside area of the city, is thought to be from £4,000 to £5,000.

An adult male, one juvenile male and two adult females were arrested and remained in custody.

In a tweet posted at 1.45pm on Tuesday, August 13, a Norwich police spokesperson said: "Out of county nominals arrested today after some pro-active policing.

"A significant amount of class A drugs and a knife have been seized."

More than 650 arrests have been made since the operation was launched in December 2016.

A large quantity of drugs and cash, as well as knives and mobile phones, have also been seized during this time.

Anyone with information about drug activity should contact Norfolk Police on 101, or contact Crimestoppers anonymously on 0800 555111.

Anyone needing support can also contact Change Grow Live (CGL) on 01603 514096.