He also said it was important that calm and normalcy was restored at the earliest.
"Had an extensive review on the situation prevailing in various parts of Delhi. Police and other agencies are working on the ground to ensure peace and normalcy," Modi tweeted.
Stressing that peace and harmony are "central to our ethos", Modi said, "I appeal to my sisters and brothers of Delhi to maintain peace and brotherhood at all times."
At least 20 people have been killed since Sunday in communal violence in