Hollywood director Michael Bay has been attacked and injured on the set of the fourth film in the Transformers series in Hong Kong, police say.
Two brothers surnamed Mak who own a shop near the film set approached Bay and demanded 100,000 Hong Kong dollars (£8,000).
When Bay refused to pay, they assaulted him. The brothers also allegedly assaulted three police officers who were called to the set.
Police said Bay suffered a minor injury to his face but declined medical treatment.
The two men, aged 27 and 28, were arrested and face charges of blackmail, assault and assaulting police officers.
Transformers 4: Age of Extinction is partly set in Hong Kong. It stars Mark Wahlberg and is to be released next June.