Hyderabad, Nov. 13 -- Senior Congress leader Salman Khurshid on Friday expressed "deep regret" over alleged surveillance targeting Leader of the Opposition (LoP) Rahul Gandhi, asserting that Gandhi speaks with "great thoughtfulness and knowledge" when raising such concerns.

Speaking on the sidelines of the Congress-hosted Bharat Summit in Hyderabad to ANI, Khurshid backed Gandhi's recent allegations of phone tapping, which have sparked a fresh political face-off between the Opposition and the ruling BJP over national security and privacy.

While declining to delve into specifics beyond Gandhi's own disclosures, Khurshid framed the alleged snooping as an attack on a core constitutional office.

"When he says something, he must be saying i...