"I am shocked to know about violence at JNU. Students attacked brutally. Police should immediately stop violence and restore peace. How will the country progress if our students will not be safe inside the university?" Kejriwal tweeted.
"Spoke to Hon’ble LG and urged him to direct police to restore order. He has assured that he is closely monitoring the situation and taking all necessary steps," he later tweeted.
Congress leader P Chidambaram attacked the government over the incident and said that such an "act of impunity can only happen with the support of the government".
It is shocking and horrifying to see live telecast of "masked men entering JNU hostels and attacking students", he said.
"What we are seeing on Live TV is shocking and horrifying. Masked men enter JNU hostels and attack students. What is the Police doing? Where is the Police Commissioner?" the former finance minister tweeted.
"If it is happening on live TV, it is an act of impunity and can only happen with the support of the government. This is beyond belief," he wrote on the microblogging site.
Anil Baijal, Lieutenant Governor of Delhi also condemned the violence. "The violence in JNU against students and teachers is highly condemnable. Directed Delhi Police to take all possible steps in coordination with JNU Administration to maintain law and order&take action against the perpetrators of violence," he tweeted.
Several students, including JNUSU President Aishe Ghosh, were badly injured in clashes which allegedly involved ABVP and Left students on the varsity campus on Sunday evening. Outsiders were also reportedly involved.
The Left-controlled students' union and the ABVP blamed each other for the attack.
Visuals from the spot showed a profusely bleeding Ghosh, who was reportedly hit over the eye with an iron rod. She was taken to a nearby hospital.General Secretary Satish Chandra was also injured, and some teachers had also been allegedly assaulted.