Cabinet Office Minister Oliver Letwin has been dumping government documents in park waste paper bins, it was reported today.
The Daily Mirror reported that Mr Letwin had been seen disposing of papers at a park close to Downing Street on five separate occasions.
The newspaper said the MP discarded more than 100 papers, including correspondence on terrorism and national security as well as constituents' private details.
One document was said to describe how intelligence chiefs "failed to get the truth" on Britain's involvement in controversial terrorist interrogations.
The West Dorset MP reportedly tore up the documents but did not shred them, leaving them still legible.
Pictures published in the newspaper show the MP apparently about to drop papers into a bin while talking on a mobile phone, and in one image he appears to hand papers to a cleaner holding a bag.
The papers are said to date from July 27 2010 to September 30 2011, and include five Intelligence and Security Committee (ISC) letters.
In one, MP Andrew Tyrie reportedly tells ISC chairman Sir Malcolm Rifkind the committee "failed to get to the truth on UK involvement in rendition".
Another discarded document refers to al Qaida links to Pakistan, the newspaper claimed.
Prime Minister David Cameron, Liberal Democrat leader Nick Clegg and Chancellor George Osborne are all said to be mentioned in the dumped papers, as are organisations including the Ministry of Defence, the Home Office and the NHS.
The Mirror described Mr Letwin's actions as a "security breach", but a spokesman for the minister insisted that the papers did not contain any sensitive material.
"Oliver Letwin does some of his parliamentary and constituency correspondence in the park before going to work and sometimes disposes of copies of letters there. They are not documents of a sensitive nature," the spokesman said.