Around 200 Gujjar protesters were on Thursday detained during their 'NCR rasta roko' agitation in support of the community's fight in Rajasthan for Scheduled Tribe status.
While 100 protesters were taken into custody from east Delhi's Akshardham locality for blocking traffic, around 100 were detained from south Delhi's Mehrauli, Badarpur, Aya Nagar locality for indulging in violence.
A senior police official said there were no major incidents of violence in Delhi even as traffic was blocked for some time in various localities of the city.
Incidents of stone pelting at police were reported from south Delhi's Aya Nagar and Mehrauli, which forced security personnel to lob teargas shells to disperse them.
Protest marches were held in Mehrauli, Aya Nagar, Mayur Vihar, Anand Vihar, Wazirabad, Surya Nagar, Khajuri Khaz, Sarai Kalekhan besides other areas.
The official said over 35,000 personnel were fanned across the city in anticipation of a strong showing by the Gujjars.
Police kept a strict vigil on Delhi borders to keep trouble-makers at bay, he added.
Security personnel were deployed in strength in Gujjar strongholds like Mehrauli, Ghazipur, Patparganj, Badarpur, Khanpur, Ayanagar, Chilla village and Rampur, the Gujjar strongholds in Delhi.
The Union Home Ministry had put the National Capital Region on high alert two days ago following the agitation call and issued advisories to Delhi, Haryana and Uttar Pradesh governments asking them to take measures to maintain peace.