The President of the United States, Joe Biden, has returned his two dogs which had been frolicking so far in the White House at his personal residence in Wilmington, Delaware.

According to American media, the younger of the two German Shepherds exhibited aggressive behavior and a "bite incident" was deplored.

Back to kennel: US President Joe Biden returned his two dogs to his Wilmington, Delaware residence after a "bite incident" involving a White House security officer, US media reported Monday .

Major, 3, the younger of the presidential couple's two German Shepherds, engaged in aggressive behaviors, including jumping, barking and charging White House staff and security guards, CNN reported, citing two anonymous sources.

The first shelter dog to live in the White House

The sources referred to a "bite incident", without specifying whether there had been an injury.

The episode was, however, considered serious enough that the two dogs, including Champ, 13, were sent back to the Biden's in Wilmington last week.

Major, adopted from an animal shelter by Joe Biden and his wife Jill in November 2018, was the first shelter dog to live in the White House, having moved in after the inauguration in January.

Donald Trump did not have a pet in the White House.

It was not immediately possible to know when - or if - the dogs would be allowed to return.

In an interview last month, First Lady Jill Biden expressed concern about moving the dogs to their new home in Washington.

“They have to take the elevator, which they are not used to, and they have to go out onto the south lawn with a lot of people watching them. So that's what obsesses me: everyone sit down and stay. calm, "she said on NBC.