Police on Friday appealed for calm ahead of Saturday’s “Clean Hong Kong” campaign organised by pro-Beijing lawmaker Junius Ho to get rid of Lennon Walls across the city.

The anti-extradition protesters have said that they will defend themselves if attacked during the campaign.

Lawmaker Ho, who has been an outspoken critic of the protests, hopes to organise tens of thousands of people “to tear the trash that affects the city, clean the walls and clean the people’s hearts”.

In a press conference, the police said it was aware of the event, especially as the organiser sought permission initially, before withdrawing the application.

Superintendent Fang Chi-kin said that Lennon Walls have been a site where some attacks and assaults took place over the past three months, and urged people to express their views in a peaceful and orderly manner.

He said whether people can be held criminally liable for destroying posters or sticky notes at Lennon Walls would depend on the circumstances.

Fang added that officers have been politically neutral in enforcing the law, and they’re determined to stop violence irrespective of their own views.

The force added that 250 officers have been hurt since June when the protests started. Over 1400 people have been arrested, of whom around 200 people have been charged.