Police said a 75-year-old man has been arrested on Thursday in connection with a fire that broke out along a road in Tsuen Wan the day before.

The blaze, which destroyed part of a six-metre-tall noise barrier on Cheung Pei Shan Road near Shek Wai Kok Estate, disrupted traffic for much of the day on Wednesday.

Chief inspector Law Sai-to of the Tsuen Wan district crime unit said the suspect was identified after reviewing CCTV footage and interviewing nearby residents.

"He lives near the scene of the crime. When he was arrested, we found three medium-sized lighters and a utility knife on him. He was arrested on suspicion of arson and possession of offensive weapon, and is currently being detained for questioning," Law said.

Investigations are continuing, he added.