New Delhi, Feb. 22 -- Security was tightened at key religious and heritage sites in the Capital following at least two intelligence inputs of planned improvised explosive device (IED) attacks by terror outfit Lashkar-e-Taiba (LeT) across major Indian cities, police officials privy to the matter said. Although the inputs were received in January and early February, Delhi remains on high alert due to the AI Impact Summit 2026 at Bharat Mandapam, which drew heads of at least 22 countries, they added. At least two senior Delhi Police officers, requesting anonymity, told HT that the first set of intelligence about the attacks in Delhi, especially at religious places, was received before the Republic Day celebrations. They said that similar input...