New Delhi/IBNS: Chief Justice of India DY Chandrachud Monday said the premier investigative agencies of the country have been "spread too thin" and must only focus on cases involving national security and crimes against the nation.

Delivering the 20th DP Kohli Memorial Lecture on CBI Raising Day, Chief Justice Chandrachud flagged how technology has changed the crime terrain and the agency is now facing a complex challenge.

"The CBI is being increasingly asked to delve into a diverse array of criminal cases beyond its role as an anti-corruption investigative agency. This places a huge responsibility on CBI to live up to its motto," Chief Justice Chandrachud said.

"I think we have spread out the premier investigative agencies too thin. They must only focus on those that concern national security and crimes of economic offences against the nation," the Chief Justice added.

He suggested digitalisation of the investigation process which can begin with the filing of a First Information Report.

Given the huge number of cases, technology needs to be leveraged to reduce delays.

"All arms of the criminal justice administration and all stakeholders including the FSLs must collaborate by holding workshops to help confront challenges we face," he said.

The other changes should include upgrading the probe agency by making structural reforms.