A Delhi court today issued open non-bailable warrants, NBWs, against three close aides of underworld don Dawood Ibrahim in connection with the IPL spot fixing scandal after the police said they had played a key role in the entire conspiracy. Special Cell of Delhi Police moved an application in the court seeking issuance of open NBWs against Pakistan-based Dr Javed Chutani, Salman alias Master and Ehteysham, who all are considered to be close associates of Dawood, saying they are based in Karachi and Lahore and were instrumental in the conspiracy behind spot fixing during the IPL matches.An NBW is termed as open when no time limit is fixed for its execution. The police also moved a separate plea in the court, seeking issuance of NBWs against four alleged bookies-Sanjay Aggarwal, Mohd Shakeel Amir, Praveen Kumar G Thakkar and Sandeep Sharma. Police said that during interrogation of other arrested accused, their names had cropped up but they are absconding to evade arrest.