<div><br />''</div>''<div>CBI has written to Jeweller Nirav Modi on his official email address asking him to join the investigation related to PNB fraud case.&nbsp;</div>''<div><br />''</div>''<div>He has been asked by the agency to immediately contact the High Commission or Embassy where he is staying so that his travel to India can be arranged. CBI directed him to join the investigation next week mandatorily.</div>