Reports indicate that 128 people have been killed since clashes erupted between security forces and mostly Sunni protesters calling for the resignation of Shiite Prime Minister Nour al-Maliki.
The Indian government said that it had received intelligence indicating an attack was in the works, and informed local police in several cities, among them Hyderabad, two days before the bombing.
India is Iran's largest customer of crude oil, so it cannot cut off ties with the Iranian regime quickly. Yet it shares US concerns about Iran's nuclear ambitions.
This week's death toll of more than 100 in the Indian state of West Bengal point to India's well-intentioned motives but mixed record in restricting the sale of alcohol.
As Indian anticorruption activist Anna Hazare gains followers and visibility, opponents are citing concerns about discrimination and nationalism.