Second extortion attempt reported on Transformers 4 Hong Kong film set

A man has been arrested on suspicion of blackmail

Director Michael Bay on the Transformers 4 film set in Hong Kong (AP)

A second extortion attempt has been reported on the Transformers 4 set in Hong Kong, according to police.

A statement released by the government said a member of the production company was setting up on the roof of a building in Kowloon when four men “intimidated her and asked her for money”.

The case has been classified as blackmail by police, who have arrested a 35-year-old man and are looking for three others.

The alleged blackmail is thought to have been perpetrated by a triad, a Chinese organised crime gang.

The case follows the assault of Transformers director Michael Bay last week, who was attacked on another filming location.

Two brothers allegedly assaulted the director and demanded 100,000 Hong Kong dollars (£7,900) from him. They have since been arrested by the police.

Transformers: Age of Extinction, which stars Mark Wahlberg and Kelsey Grammer, is due for release in June next year.

Studios are increasingly filming parts of their big blockbusters in China, exploiting the ever-increasing box office potential of the Asian territory.

This year's Iron Man 3, which had special scenes featuring Chinese actors, took $121m (£75m) in China, making it the Marvel film's biggest market outside of the US.

With additional reporting from the Associated Press