A group of motorcycle-borne assailants on Monday shot dead a bank official and a security guard of a cash van in Bihar's Patna district and looted Rs 60 lakh, police said.

The Punjab National Bank official and security guard were shot dead when they were on their way from Barh town to Belchi area to refill cash in an ATM, Patna Senior Superintendent of Police Manu Maharaj said.

The police were investigating the incident.