The Anti-Corruption Branch of Delhi government told a court here that it is probing the role of government officials in alleged corruption in fitness test of commercial vehicles. The ACB told the court that it has already issued notice to former Transport Commissioner R K Verma to join investigation into the alleged irregularities in awarding and execution of contract for fitness test of commercial vehicles. Appearing before Special Judge Narottam Kaushal, the ACB said investigation with respect to involvement of public servants is at an advanced stage. ‘The then transport commissioner R K Verma has been served a notice under section 160 CrPC (Police Officer's power to require attendance of witnesses),’ the court noted.