Police in London opened fire outside the Ukrainian embassy on Saturday after a man rammed his vehicle into the ambassador's empty parked auto at least twice before being arrested, officials said.
Embassy staff called police when the ambassador's vehicle, which was parked outside with nobody in it, was deliberately rammed.
The Metropolitan police said armed officers were dispatched "as part of the protective security arrangements for London".
London's Metropolitan Police said firearms and stun guns were used to stop and detain a suspect who drove a vehicle at a police auto when police arrived on the scene.
Police said the incident was not considered terrorist-related, and that several other cars parked on the street near the embassy, in London's Holland Park neighborhood, had also been hit.
'In response, the police were forced to open fire on the perpetrator's vehicle. Thus, now he is in custody at a central London police station.
The woman, who did not wish to be named, said officers arrived "very quick", adding: "I saw many police cars coming". Police did not report any injuries to the suspect.
The Ukrainian Embassy website says Natalia Galibarenko has been its ambassador since 2015.
Adding: "I would like to pay tribute to the officers involved in this incident who responded this morning and put themselves in harm's way as they do every day to keep the people of London safe".
One witness, who works at a nearby shop, said she heard shots fired twice.
Senior police officer Andy Walker said there would be an investigation into the discharge of a police firearm, as in line with procedure.
Ruptly's footage from the scene shows a sedan with its doors open in the middle of the street and forensic officers examining the area. The Director of Professional Standards has been notified of the incident.