The National Accountability Bureau will file, during the next few days, another reference against former LDA director general Ahad Cheema. Informed sources say that the new reference accuses Mr Cheema of having made illegal assets worth Rs 700 million. There will also be some co-accused named in the reference. Mr Cheema is already facing a reference for alleged irregularities in the Ashiana-i-Iqbal Housing scheme. Sources privy to all proceedings against Mr Cheema in the first reference claim that the accountability court has been regularly extending the remand of the accused for the past many months because it is convinced that the reference is based on strong proofs and that the investigation is going on in the right direction. Had this not been the case, the accused would have sought release through court, the sources said. Under the law, the sources said, it was for the accused to prove his innocence.