An additional five pages of classified material has been found in US President Joe Biden’s family home in Delaware, the White House has said.

Biden’s lawyer Richard Sauber said he discovered the additional documents on Thursday which were immediately handed to the Justice Department.

Mr Biden’s lawyers have said the documents relate to his time as Barack Obama’s vice-president.

A special counsel is investigating Mr Biden’s handling of the files.

The discovery of documents throughout the investigation has been called a political embarrassment for Mr Biden, as it comes during an ongoing investigation into former President Donald Trump’s own alleged mishandling of classified files.

One document with classified markings had already been found in the garage of Biden’s Delaware family home this week, where he keeps his 1960s Chevrolet Corvette sports car.

But now, the White House has said an additional five pages of classified documents were found at Mr Biden’s residence on Thursday evening.

The six pages found in Mr Biden’s home this week are in addition to documents found in Mr Biden’s garage in December and at his former offices at the Penn Biden Center in November.

On Friday, CBS News reported that around 10 documents discovered at the Penn Biden Center, and marked as classified, included top secret material.

There are three basic levels of US classification: confidential, secret and top secret. A leak of top secret information could cause “exceptionally grave damage”.