"The United States stands with India in combating the scourge of terrorism and we are also prepared to offer any and all assistance Indian authorities may need," State Department spokeswoman Victoria Nuland said at a news briefing.
Rana Banerji, a former security official, said India remains vulnerable to such attacks because there is poor coordination between the national government and the states. Police reforms are moving very slowly and the quality of intelligence gathering is poor, he said.
"The concept of homeland security should be made effective, on a war footing," he said.
Associated Press writers Ashok Sharma in New Delhi and Matthew Pennington in Washington contributed to this report.
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