Joe Biden's Files Exposed - Discussing US President Biden's Classified Files...

Classified files recovered from US President Joe Biden's former private office reportedly include some material marked top secret.

Papers with the highest classification level were among about 10 files at a think tank bearing his name, according to the BBC's US partner CBS News.

Fewer than 10 classified documents were found at one of his Delaware homes, but none were top secret, says CBS.

A leak of top secret information could cause "exceptionally grave damage".

There are three basic levels of US classification: confidential, secret and top secret.

In total, roughly 20 classified files were recovered between the two locations, reports CBS, citing a federal law enforcement official familiar with the investigation.

The papers only began to come to light in news reports last Monday, but the first batch was found at Mr Biden's former institute, the Penn Biden Center in Washington DC, back in November.

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