The CBI's special investigation team (SIT) today told the Supreme Court that it would examine bank account details of persons who had visited the official residence of its former chief Ranjit Sinha, who, it claimed, had prima facie tried to scuttle the probe in coal scam cases.<br/><br/>The SIT, which filed a report giving status of its investigation into the matter, told a bench headed by Justice Madan B Lokur that substantial progress has been made in the investigation and its scope has been widened.<br/><br/>The apex court, which is monitoring the probe by the CBI and the ED into the coal scam cases, expressed its displeasure over the tardy pace of probe.<br/><br/>The top court had in January last year constituted then SIT headed by the CBI director to look into the prima facie allegations against Ranjit Sinha of trying to influence the probe in coal scam cases.