Michael Bay was attacked on the set of 'Transformers: Age of Extinction' in Hong Kong.
The action director - who is currently shooting the fourth instalment of the alien robot franchise in China - received injuries to the right side of his face after two brothers attempted to demand HK$100,000 (£8,030) from him, according to local press.
The two men confronted Bay, 48, on the film's set, but things quickly turned sour and police were called to the scene.
One of the assailants is thought to have attacked the director, as well as three police officers. Bay opted not to go to hospital for treatment and instead carried on shooting in the busy area.
The men were charged on suspicion of blackmail and assault.
'Transformers: Age of Extinction' stars an all new-cast led by Mark Wahlberg. The film will also feature Nicola Peltz, Jack Reynor, Sophia Myles, Stanley Tucci and Kelsey Grammer.
The movie is partially shooting in China under a co-production deal between Paramount Pictures and the state-owned China Movie Channel. In addition to the Hollywood cast, Bay has also cast some Chinese actors in the movie, including Li Bingbing.
'Transformers: Age of Extinction' is due for release in June 2014.
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