India is challenged by China's "reckless aggression" on its northern borders, Defence Minister Rajnath Singh said on Tuesday at the India-US 2+2 Ministerial Dialogue.

"Excellencies, in the area of defence, we are challenged by reckless aggression on our northern borders," he said in his opening remarks, as per the US State Department read out of the opening statements of all the dignitaries of the dialogue.