Demonstrators forced their way into the building that houses BlackRock’s office in Paris Thursday, taking their protest against the government’s pension reforms to the world’s biggest money manager.

Videos shared on social media showed protesters entering the Centorial office block, located near the Opéra Garnier opera house, holding red flares and firing smoke bombs.

About 100 people, including representatives of several labor unions, were on the ground floor of the building for about 10 minutes, chanting anti-reform slogans. BlackRock’s office is located on the third floor.

“The meaning of this action is quite simple. We went to the headquarters of BlackRock to tell them: the money of workers, for our pensions, they are taking it,” Jerome Schmitt, spokesman for French union SUD, told CNN affiliate BFM-TV. BlackRock declined to comment.