ISLAMABAD - National Accountability Bureau on Friday arrested two accused, including former superintendents of FBR Sarfraz Ahmed and Atif Raza, in a mega corruption case. Both the accused along with private persons were involved in misuse of authority and illegal refund of sales tax by using fake invoices. Both allegedly misappropriated and committed fraud of Rs44.53 million. It is alleged that M/s H&Y enterprises in connivance with the arrested FBR persons used false invoices of 28 fake suppliers to gain fraudulent returns.