Officials said the investigators had spotted 70 attackers through TV footage, Dawn online reported Saturday.
The investigators has also announced a reward of Rs.100,000 (about $977) for those who could help in identifying the attackers.
In this regard, an advertisement was also published in local newspapers.
The arrested protesters were being interrogated about the whereabouts of other attackers.
According to a senior police official, about 80 percent of the attackers were affiliated with the Pakistan Tehreek-i-Insaf (PTI) and the Pakistan Awami Tehreek (PAT).
The protests led by PTI leader Imran Khan and PAT leader Tahir-ul-Qadri began Aug 15 in an attempt to overthrow Prime Minister Nawaz Sharif, whom they have accused of rigging the 2013 general elections.
The PTI and PAT are currently engaged in talks with the federal government to broker a settlement over the political impasse that had gripped the country for weeks.