Officers and paramedics first arrived in Essex Road, near the Mawney Road junction, at around 9.15pm last night to carry out an arrest enquiry related to a domestic incident.
A 50-year-old man then ran out of the house with a meat cleaver and attempted to assault armed police officers who were forced to detain him.
The suspect was arrested on suspicion of making threats to kill.
He was taken to a hospital where he remains in custody.
Tags: Romford, Havering, Collier Row
