Pan-democrat lawmaker Wong Yuk-man said his remark that opponents of the government's "fake consultation" on electoral reform would begin throwing petrol bombs and not eggs was "a reminder", not a threat.
"I was telling [the chief secretary] the public sentiment was rising and I foresee that something like [throwing a petrol bomb] may happen," Wong said.
Chief Executive Leung Chun-ying said the government "would not tolerate" Wong's "threatening" words to Chief Secretary Carrie Lam Cheng Yuet-ngor on Monday. Wong was criticising the government's consultation on electoral reform at a Legislative Council panel meeting.
The latest Hong Kong University poll found confidence in the chief executive remained at record lows. The gap between people expressing no confidence in Leung - 66 per cent of 1,006 people polled - and the 20 per cent who expressed confidence is the biggest since he took office.
The pan-democratic group Civil Human Rights Front, which supports the Occupy Central movement, announced plans for a march on New Year's Day. The rally, co-organised with the Alliance for True Democracy, will take marchers from Victoria Park to Chater Garden, where organisers will talk about the principles of non-violent civil action.
Group convenor Johnson Yeung Ching-yin said the rally aimed to prepare Hongkongers for the "struggle to win in the battlefield of universal suffrage".
Another 10 groups will participate in the march, where pan-democrats plan to articulate their demands for the 2017 election, including public nomination and no screening of candidates.
While Occupy Central is expected to conduct a multimedia vote on its electoral proposals, Yeung said a polling station would be set up at the rally's starting point to accommodate voters less familiar with technology and register feelings on key issues of reform. The march is yet to be approved by police.