"My heart goes out to everyone who lost their loved ones today. We share their pain & offer our deepest condolences.
"Strongly condemn the cowardly terrorist attack at a school in Peshawar. It is a senseless act of unspeakable brutality that has claimed lives of the most innocent of human beings - young children in their school," Modi tweeted.
At least 124 students were among 126 people killed today when heavily-armed Arabic-speaking Taliban suicide attackers stormed an army-run school, shooting from classroom-to- classroom and taking several hostages using them as human shield in Pakistan's volatile Peshawar city.