The protesters, many of them women, were allegedly manhandled by the traders when they attempted to remove them physically.
At around 11 am, around 40 men claiming to be local traders reached the spot and asked the protesters to move, complaining that the demonstration was harming their business.
"We have been sitting idle in our shops with no business. Who will compensate us?" said Babu Lal, a representative of the Timber Trader Association.
He said their business was getting affected as the protesters had blocked the road leading to Nithari due to which no vehicles could ply on that stretch.
With the situation becoming tense, a riot control vehicle was called in by the administration. The situation was brought under control after the police asked the traders to apologise to the protesters.
"These people want us to stop the agitation and the police is also helping them. Police kept on watching while they manhandled us," said Gulab Devi, whose two-year-old son Hari Lal went missing two years back.
Meanwhile, a CBI team visited the D-5, Sector 31 residence of main accused Moninder Singh Pandher's house. They spent around half-an-hour inside the house.