India, Nov. 20 -- Police in Faridabad have obtained three years' worth of sales records from at least seven major fertiliser shops across Sohna, Nuh, Faridabad and Palwal as part of the investigation into the Red Fort blast, officers said on Wednesday. The objective, they said, is to determine whether accused doctors Umar-un-Nabi and Muzammil Shakeel Ganaie purchased fertiliser from these shops to assemble explosives.

At least seven shop owners, whose records were obtained, were detained between November 12 and 15 at an undisclosed location in Faridabad but were released after nothing suspicious surfaced during questioning. Investigators, however, subsequently seized their sales data for a detailed audit to identify whether any individua...