A police officer and a police community support officer have been stabbed in a street attack, witnesses have said.

Members of the public said the uniformed officers suffered head injuries in Ealing, west London.

A large number of police vehicles and ambulances blocked Ealing Broadway and an area of pavement was cordoned off with police tape.

One witness said the officers were injured in a scuffle with the man in the busy shopping area.

A Metropolitan Police spokesman said the PC and PCSO were taken to hospital by ambulance.

He said the PCSO is believed to have suffered non-life threatening injuries but the Pc may have been more seriously wounded.

The spokesman said the attack took place after a "police stop", which could mean the officers were trying to stop and search the man.

The suspected attacker has been arrested.

Model Portia Freno said she witnessed the attack as she travelled to a photoshoot.

Writing on Twitter, she said: "I am disgusted. Two police officers just got stabbed in the head in Ealing. Not a nice thing to witness at all."

She posted a photograph showing an ambulance, a paramedic fast-response car and a large number of police vehicles parked in the street.