She was carrying a yellow riot helmet in the crook of her arm.

We put on riot helmets to hide our faces.

Three times as many police officers in riot helmets responded.

The man in the riot helmet looked briefly at the credentials, then nodded and stepped to the side.

In front of him stood "the guardsman" taking off the riot helmet.

She was standing there, swinging her riot helmet by its strap, looking interested for his sake.

Police with riot helmets in hands are lining up to stop anyone trying to rush the couple.

When the group arrived at the headquarters, four officers wearing riot helmets went out to observe.

Just a few officers were on hand, and only one wore a riot helmet.

Officers were jamming riot helmets on, even as they ran.