 According to the e-mail, the main motive seems to have been a retaliation to the situation in the Gujarat and Kashmir regions, possibly referring to the alleged oppression of Muslim minorities in certain parts of the region.It also says that the blasts were part of a series of attacks aimed at other sites such as the Mumbai international airport, Gateway of India, the Taj Mahal in Agra and the Red Fort in New Delhi.The authorities are investigating this claim and are trying to track the location of the e-mail sender.