(CNN) — A man was arrested in Hong Kong on suspicion of sedition after playing the harmonica at a vigil for Queen Elizabeth II, under a colonial-era law that once outlawed insulting the Queen.

Videos posted to social media show hundreds of people gathering outside the city’s British consulate Monday and Tuesday to pay tribute to the Queen as her funeral took place in London — an event heavy with political significance in the former British colony, where mourning the monarch has become a subtle form of protest.

Why a man playing the harmonica at a vigil for the queen was arrested comes via ChinaTechNews.com.