Responding to questions on the lynching of a man in a village in Uttar Pradesh's Dadri over suspicion of having eaten beef, Rajnath Singh said his ministry would look into the state government's report about the incident.
He was talking to reporters on the sidelines of a function here to mark the 80th birth anniversary of late farmer leader Mahendra Singh Tikait.
Sources said the home ministry has received a report from the Uttar Pradesh government on the incident.
On September 28, Mohammed Akhlaq, 50, a resident of Bisara village of Dadri in Greater Noida near Delhi, was dragged out of his home and lynched following rumours that he ate beef. His family denied the allegations.
Akhlaq's 21-year-old son Danish was also left critically injured. He is recuperating in hospital.
The home ministry had on Monday expressed concern over incidents having communal overtones, including the Dadri incident, and directed state governments to act strictly against elements seeking to exploit religious sentiments.
Asked about the violence that erupted in Varanasi on Monday during a march of saints and Hindu religious groups to protest against baton charge and ban on immersion of idols in the Ganga, Singh termed it as "very unfortunate".
"Law and order is a state subject. I have spoken to the concerned authorities in Uttar Pradesh in this connection and they have assured me that they were trying their best to normalise the situation," Singh said.
Varanasi is the Lok Sabha constituency of Prime Minister Narendra Modi.
Curfew was clamped in four police station areas in Varanasi and was lifted by Monday midnight.
At least 26 people have been arrested for their involvement in the violence that left over 50 people injured, including a magistrate and a circle officer.