Beijing’s national security arm in Hong Kong has slammed attacks and smears on the coming Legislative Council election, while the city’s anti-corruption agency arrested three people for allegedly reposting online content inciting others to abstain from voting or to cast invalid ballots. The Office for Safeguarding National Security on Friday condemned acts by some people to disrupt the December 7 election, including inciting others not to vote or to cast “blank ballots” and deliberately damaging...