A cybercrime investigation that began with a suspicious bank account in Northwest Delhi has led to the arrest of five bank officials and a man as well as the unearthing of an alleged network of mule accounts linked to cyber fraud complaints across the country, police said on Friday.

In June this year, officers at a cyber police station received information about an account at the Tri Nagar branch of CSB Bank, formerly Catholic Syrian Bank, that was allegedly being used to route money obtained through fraud. The account had over 100 complaints against it on the National Cyber Crime Reporting Portal (NCRP), police said.

The account was found registered in the name of Rahul, purportedly a resident of Najafgarh.…