Hong Kong democracy advocates expressed alarm Friday after Chinese army vehicles were photographed travelling down a major thoroughfare, in what they condemned as a show of "military might" ahead of expected protests. At least four People's Liberation army (PLA) armoured personnel carriers were seen in the small hours of Thursday near the busy Jordan and Yau Ma Tei regions of the city, the Apple Daily newspaper reported. The vehicles, with short guns mounted on turrets, were spotted at a time of heightened public discontent in the semi-auto**mous city over perceived interference by Beijing and a debate over how the next chief executive will be chosen under planned reforms. Beijing has promised the former British colony will be able to vote for its own leader in 2017.