Jaipur Police have confirmed that Atif, Sajid, Junaid and Saif are behind the Jaipur blasts. They came to the Pink City on the May 11 and surveyed the area. They decided where to buy the bicycles from then and went back to Delhi. They again came back on May 13 carrying bombs and planted the bombs. They again went back by Shatabdi at 5 pm. The bombs went off at 6.30 pm.