Prime Minister Narendra Modi on Tuesday vowed that those responsible for the Delhi blast will be brought to justice, saying agencies are working through the night to uncover the conspiracy behind the attack that killed nine people near the Red Fort on Monday evening.

Prime Minister Modi is visiting Bhutan to join the 70th birthday celebrations of the fourth king of the Himalayan nation Jigme Singye Wangchuck. Advertisement

Addressing an event in Bhutan, the Prime Minister said, "Today is a very important day for Bhutan, for the royal family of Bhutan, and for all those who believe in world peace. For centuries, India and Bhutan have shared a deep emotional and cultural bond. That is why it was my commitment - and India's - to be present on this significant occasion."

He then paused to

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