A popular slogan of Hong Kong’s months-long anti-government protests was spray-painted on the wall outside one of the Chinese Army’s bases in the city, according to the report on Thursday.

The eight words in Chinese – “Liberate Hong Kong; Revolution of our times” – were found daubed on the external walls of Gun Club Hill Barracks late on Wednesday, the South China Morning Post (SCMP) newspaper reported.

Police officers arrived at the barracks and found no suspects, after a passer-by called emergency services.

On Wednesday, an investigation was launched but no arrests have been made so far.

The 11-hectare military site is one of the barracks occupied by China’s People’s Liberation Army since the transfer of sovereignty of Hong Kong from Britain on July 1, 1997.

Demonstrations in Hong Kong began in June following a controversial extradition bill, already withdrawn by the government, but have mutated into a movement seeking to improve Hong Kong’s democratic mechanisms and safeguard the region’s partial autonomy from Beijing.

Hong Kong’s protests are largely leaderless and organised online. They were initially sparked by a now-abandoned attempt to allow extraditions to the mainland but have since morphed into a popular revolt against Beijing’s rule.

The protests, which have been drawing massive crowds since June following a contentious proposed extradition law that has been pulled by the government, have mutated into a movement that seeks to improve the democratic mechanisms that govern Hong Kong and safeguard – or expand – the region’s partial autonomy from Beijing.

In 2018, the Hong Kong government had disqualified the candidacy of another pro-democracy activist, Agnes Chow, for the Legislative Council by-election in March of the same year due to her stance on advocating self-determination for the former British colony.

The controversial China extradition bill was withdrawn in early September but the movement has morphed into a wider campaign for greater democracy and against alleged police brutality.