Representatives of drivers for the city's three main bus operators threatened to stage co-ordinated industrial action after the latest round of talks with their employers about pay rises ended yesterday without agreement.
Emerging from meetings with their respective employers - Kowloon Motor Bus, New World First Bus, and City Bus - unionists said they would not rule out a united slow-drive protest or a strike if their demand for a 4 per cent rise was not granted in fresh talks tomorrow.
Chanting slogans and holding banners, more than 100 drivers, led by union chiefs and legislator Wong Kwok-hing, marched to the Murray Building in Central to hand a petition to transport minister Sarah Liao Sau-tung after yesterday's meetings.
Mr Wong and the bus drivers want Dr Liao to attend tomorrow's meetings with the employers.
Lam Shun-ping, representing KMB drivers, said: 'We don't rule out the possibility of united strike action.'
Chung Kin-wah, deputy director of the KMB branch of the Motor Transport Workers' General Union, said they may also consider a slow- drive protest.