The National Investigation Agency, NIA, has intensified its probe into the alleged role of suspected American terrorist and LeT operative David Headley in the Mumbai terror attacks. <br/> <br/>An NIA team conducted raids and searches at several places in south Mumbai and western suburbs of the city on Saturday.<br/> <br/>Maharashtra government has said that a team of Mumbai Police will visit the US to gather more information from American investigation agency about Headley's role in Mumbai attacks. <br/> <br/>Mumbai Police is conducting a parallel inquiry into the Headley's terror activities. <br/> <br/>Gujarat as well as Kerala Police were also finding out the authenticity of the reports that Headley had visited to these two states.<br/> <br/>Meanwhile, Union Home Minister P Chidambaram refused to share with the media details of the probe on LeT plot to carry out terror attacks in India. <br/> <br/>He said, investigations into the Headley case is not a cricket match for which a ball-by-ball description has to be given. <br/> <br/>Mr Chidambaram said, detailed information will be given to the media after the completion of investigations into it.<br/>