Production on the set of the Bollywood action movie “Bbuddha” starring Amitabh Bachchan was brought to a screeching halt, in Mumbai on Tuesday after a political party protested against the use of foreign dancers.

Members of the Maharashtra Navnirman Sena (MNS) reportedly barged onto the set, and told the crew to stop filming, claiming that 40 overseas artists were performing without valid work permits.

Although foreign performers are often used in Hindi-language Bollywood for the trademark lavish song-and-dance routines; the MNS reportedly has an often violent track record of protesting against migrant workers in Mumbai and Maharashtra state.

UPDATE: hindustantimes.com reports that “Bbuddha” director Puri Jagannath has apologized in a letter addressed to MNS, “We had hired foreign junior actors and dancers in our film. We found that the juniors were without the work permit and dancer’s visa had expired … We want to apologise for the neglect and assure you that this shall not happen in the future and will perform all activities as per law without hurting anyone’s sentiments.”