Thane (Maharashtra), March 9 In a fresh twist in the Thane CDR case, the city police's Crime Branch has summoned Bollywood actor Nawazuddin Siddiqui for investigations, but he failed to respond, official sources said here on Friday. The acclaimed award-winning actor was allegedly accused of spying on his wife and his name cropped up after the police in Thane nabbed 11 persons, mainly private detectives, who were involved in the Call Detail Records scam. According to statements by some of the accused, Siddiqui had allegedly acquired CDRs of his wife's phone through an advocate by hiring a private sleuth to keep an eye on her contacts and whereabouts. "One of the accused has revealed the name of Siddiqui during interrogation. We have issued summons to him, but he has failed to appear before us for investigations," Thane Crime Branch Senior Police Inspector Nitin Thakare said on Friday. The accused have revealed the names of several other Bollywood personalities, businessmen and even politicians who are likely to be probed soon, investigators said. However, Thakare said the police cannot identify other suspects till the full probe into the sensational case is completed. Incidentally, Pandit's name cropped up during the interrogation of four other private detectives arrested in January this year -- Makesh Pandiyan, Pratik Mohpal, Prashant Palekar and Jigar Makwana -- all nabbed from Thane and two others later -- Prashant Sonawane and Santosh Pandagle, both from Navi Mumbai.