The BBC has said it "does not name its sources nor is it appropriate to go into detail around editorial processes" regarding the Sir Cliff Richard raid leak.
In response to a letter from Home Affairs Select Committee chair Keith Vaz demanding answers from the broadcaster, a BBC spokesperson said: "We have received the letter and will respond in due course.
"Mr Vaz understands and supports the right of the media to report matters in the public interest.
"The BBC's editorial independence is protected by our Royal Charter and is highly valued by the public. The BBC does not name its sources nor is it appropriate to go into detail around editorial processes."
More top news
The Labour leader said newspapers were going "a little bit James Bond" over the "increasingly wild and entirely false" claims.
The "astonishing" find was made during an excavation at Vindolanda, near Hexham in Northumberland.
A High Court judge has ruled that doctors can stop providing life-support treatment to Alfie Evans against his parents' wishes.