A team from the Atomic Energy Regulatory Board (AERB) today launched investigation into the lapses by Delhi University in auctioning of radioactive material leading to the death of a labourer recently. The four-member team is also looking for certain radioactive pencils which are reportedly missing. <br/>The team went to the Physics Department which makes use of the radioactive material in its labs. They also spoke to the faculty members and inspected the lab. AERB on Thursday had issued notice to the university to explain within two weeks how safety norms were violated and how the varsity could auction such material which could prove fatal. Vice-Chancellor Prof Deepak Pental has admitted negligence on part of the university and said it took moral responsibility.<br/>