(FILES) This July 13, 2011 file photo shows Indian security personnel and investigators at a bomb blast site in the Dadar District of Mumbai. Triple blasts in Mumbai last week have cast a shadow over the imminent visit of US Secretary of State Hillary Clinton to New Delhi and a new round of India-Pakistan peace talks later this month. AFP PHOTO/Sujit JAISWAL *** Local Caption *** 433144-01-08.jpg
Indian police officials gather around a bomb blast site at the Opera house area in Mumbai on July 13, 2011. No-one has claimed responsibility for the bombs on July 13 evening that killed 19 and injured more than 100, and the initial police investigation h???
This picture posted on Twitter shows the scene of a bomb blast at Zaveri bazar in Mumbai on July 13, 2011. AFP PHOTO/ Pravin Jain / FILES
July 17, 2011: Rohida Faiz Usmani (C, in black), widow of Faiz Usmani, who died during police custody following recent bomb blasts, is seen outside a hospital with a crowd following news of her husband's death in Mumbai. Faiz Usmani died of a brain haemo???
July 15 2011: Indian policemen stand at the blast site at Opera House business district in Mumbai, India. According to media reports, investigators were examining security camera footage for clues to the Mumbai triple bomb blasts that killed 17 people, an???
July 16 2011: Indian people carry Indian flags as they participate in a peace march at the blast site at Opera House to pay homage to the bomb blast victims in Mumbai, India. EPA/DIVYAKANT SOLANKI
July 16 2011: A man holds a candle during a rally against Wednesday's triple explosions in Mumbai. India's Prime Minister Manmohan Singh vowed on Thursday to bring to justice those behind triple bomb attacks on Mumbai, and police questioned members of hom???
July 14 2011: A policeman stands guard with the backdrop of the India Gate war memorial, a popular tourist place, in New Delhi, India. Security across India is on high alert following the explosions in Mumbai on Wednesday. AP Photo/Gurinder Osan