Hong Kong ? Two bottles of acid were thrown into a crowd in a popular shopping district in downtown Hong Kong on Saturday, injuring 30 people, police and news reports said.

It was the second such attack in five months in the neighborhood.

Television footage showed firefighters washing off victims’ arms and legs before sending them to hospitals for treatment. Some had holes in their clothing.

Hong Kong Cable TV said people in the Mong Kok district had been splashed with acid, though police Superintendent Leung Ka-ming would not confirm what liquid was thrown.