A man has been arrested after an attack at a hospital left two staff members and five patients injured.
The two female employees received minor injuries as they restrained the 22-year-old man who was being treated at Newham General Hospital in Plaistow, east London.
He is thought to have mental health problems.
One of the victims, a woman in her 60s, suffered serious head injuries in the attack in the early hours of Saturday morning but is now in a stable condition, the Metropolitan Police said.
It is thought the injured patients had been asleep when they were attacked on the general medical ward.
A Met spokesman said an “improvised weapon” was used to strike the victims.
The force was alerted to the incident at 00.40am. The three males and one other female patient who were assaulted are in a stable condition at the hospital.
The man was arrested on suspicion of a public order offence and remains in police custody.
A spokeswoman for Newham University Hospital NHS Trust confirmed that neither drugs nor alcohol were factors in the incident.
She said: “Newham University Hospital NHS Trust always places patients and their safety at the centre of our decision making. Senior management were on site to manage this incident and are working alongside the Metropolitan Police today to help them with their ongoing inquiries.