A woman was dragged into an alley in Bungay by a man who threatened to kill her and tried to strangle her.

The attacker only ran off when passers-by heard her screams and came to the rescue.

It is thought the victim, in her 30s, was walking home from a night out when she was pounced on in Upper Olland Street at about 12.50am today.

Her attacker grabbed her from behind and pulled her into a nearby alley, The Folly, where he assaulted her.

He only released her when a number of people ran towards them to help her. The witnesses then comforted the woman who did not need hospital treatment.

The attack did not result in a sexual assault but police believe that may have been the motive if he had not been disturbed and said she had a 'very lucky escape'.

The assailant is described as white, stocky, 30 to 50 years old, bald or shaven headed, possibly with glasses, wearing a dark jacket or fleece and jeans.

Det Sgt Simon Bridgland, of Lowestoft CID, said: 'We are particularly keen to speak to anyone who may have been in the area of Upper Olland Street at the time of the incident and who may have any information that could help us trace this offender.

'This type of assault is rare and we are doing all we can to locate the person responsible as quickly as possible. Thankfully the victim did not receive any serious injuries but is understandably extremely upset and shaken by the incident.

'We would urge anyone with any information to call as soon as possible.'

Anyone who can help is asked to call Det Sgt Bridgland on 01473-613500.