They have been told to disperse immediately and Federal Reserve Unit (FRU) personnel were seen preparing to use tear gas.
Police personnel have refrained from any violence, apart from pushing those trying to break the barrier to the ground.
Police personnel stationed at the entrance to the House to monitor the situation asked the group to disperse.
However, the organisers told protesters to sit on the sidewalk, as they had a memo to hand to the Prime Minister, on the issue of the Election Commission being under Parliament.
Lawmakers from both sides were seen entering the House.
Activists who had camped out since Saturday at Padang Merbuk nearby, joined the group in front of Parliament at around 8.30am.