The government will seek legal advice on whether to prosecute activist Matt Pearce for hanging a picture protesting against pollution among the masterpieces at the Centre Pompidou at the Museum of Art. Mr Pearce and another member of the protest group International Action stuck the picture - of a sailor in the centre of Victoria Harbour screaming, 'Donald, we can't breathe!' - next to a painting by Henri Matisse. They took a video of their actions and posted it on the popular video website youtube.com The Leisure and Cultural Services Department said the matter had been reported to the police and legal advice would be sought from the Justice Department about whether to prosecute. Mr Pearce, 31, said the picture had been there since Friday morning and no one seemed to have noticed. 'We got in there and waited for the right moment. When they weren't looking we just put it on the wall with Blu-Tack,' he said. 'The guards didn't realise the painting didn't belong there.' He said he was given legal advice beforehand that provided he used a non-damaging adhesive he would be in the clear. Mr Pearce has previously been in court for such antics as running on to the Sha Tin racecourse dressed as a horse and perching atop a video screen in Central dressed as Spiderman. He is on bail pending appeal against conviction and a 42-week jail term imposed in June for what a magistrate termed a 'nasty' campaign to embarrass his former girlfriend. Mr Pearce hung the small acrylic-on-canvas painting next to Matisse's Young Girl in White, Red Background at the Museum of Art. '[In the painting] you can see that there's a heavily polluted sky to illustrate the pollution problem,' said Mr Pearce, who has been living in Hong Kong for nine years. A department spokesman said Mr Pearce's painting was hung outside the museum's protected zone. Security at the museum has been tightened.