A man arrested in Hong Kong for hurling bottles of acid at people in a crowded street is no longer a suspect, police have said, indicating that the real culprit is still at large.

At least 30 people were injured in the acid attack on Saturday night, the latest in a string of unsolved attacks that has terrorised the city.

The people injured in the attack included nine tourists and a seven-year-old child. All the victims have been treated at local hospitals for burns and released.

The liquid was thrown on them near Temple Street, a densely populated district known for its outdoor shops and restaurants in the city's Kowloon area.

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