A woman has been arrested in Cambridge in connection with a stabbing in Thetford.

The victim, who remains in critical condition at Addenbrooke's Hospital, was attacked shortly before midday on Mother's Day while he and his family were walking along Bury Road.

Three people, a woman in her 40s, a woman in her 20s and a man in his 40s, were arrested at a home in Amulet Close on suspicion of conspiracy to commit murder on Sunday. 

They have since been released on police bail until May 7.

READ MORE: Manhunt under way after 'long-running disagreement' ends in Mother's Day stabbing

Further enquiries led police to an address in Cambridge on Monday night where a woman in her 30s was arrested on suspicion of assisting an offender.

She was taken to Bury St Edmunds Police Station for questioning where she remains.

Two men who police believe were involved in the incident remain on the run and officers are carrying out house-to-house enquiries in the area.

Bury Road has been reopened but a cordon remains in place at the property in Amulet Close while investigations continue.