Photo shows unaccompanied migrant children crammed in a single playpen at an overcrowded border facility

• A photo shows unaccompanied migrant children housed in a playpen at a border facility.
• Children aged between 3 and 9 are kept there with mats for sleeping, the AP reported.
• The facility is overcrowded, and pods around 3,200 square feet had more than 500 children in them.

A photo shows young, unaccompanied migrant children crammed in a playpen at an overcrowded facility at the US-Mexico border.

The single Department of Homeland Security facility in Donna, Texas, that has a capacity of 250 is housing more than 4,000 migrants, including children, the Associated Press reported.

And some pods around 3,200 square feet in size had more than 500 children in them, according to the AP.

One photo shows young children, wearing masks due to the coronavirus pandemic, in a crowded playpen.

According to the AP, the children aged between 3 and 9 are kept apart from everyone else, and are kept in a playpen where they have mats for sleeping. They are the youngest children in that facility's custody, Oscar Escamilla, acting executive officer of the US Border Patrol in the Rio Grande Valley, told the AP.

The children in the playpen crossed the US-Mexico border by themselves, Escamilla added.

An increased number of unaccompanied children have been arriving at the US border after policy changes by President Joe Biden's administration, including measures to reverse controversial Trump-era policies.

The Biden administration says that it doesn't want to turn unaccompanied children away to dangerous conditions, or to send them to someone in the US who has not been properly vetted - leading to crowded centers at the border.

Human rights groups say that children are being held in "inappropriate" detention centers.

See more photos of the facility here»