India’s anti-terrorism agency spearheaded on Wednesday the third day of investigations into a car blast in the capital, as a hospital official said the death toll had increased to 12. Police are yet to give exact details of what caused the intense explosion near the historic Red Fort in the crowded Old Delhi quarter of the city, one of India’s most well-known landmarks, and the site of the annual prime minister’s Independence Day speech. The blast was the first such explosion i