The United States has transferred six men from its Guantanamo Bay prison to Oman, the Department of Defense said Saturday, amid an ongoing push by President Barack Obama to close the jail.

The United States has transferred six men from its Guantanamo Bay prison to Oman, the Department of Defense said Saturday, amid an ongoing push by President Barack Obama to close the jail.

"The United States is grateful to the government of Oman for its humanitarian gesture and willingness to support ongoing US efforts to close the Guantanamo Bay detention facility," the department said in a statement.

The six men were named as Idris Ahmad Abd Al Qadir Idris, Sharaf Ahmad Muhammad Masud, Jalal Salam Awad Awad, Saad Nasser Moqbil Al Azani, Emad Abdallah Hassan and Muhammad Ali Salem Al Zarnuki, according to the statement.

US media reported that all six detainees were Yemeni.

The transfer means 116 inmates remain at the controversial prison, which is located at a US naval base in southeastern Cuba.

Saturday's announcement marked the second Guantanamo prisoner transfer this year, after the Pentagon announced in January that is had moved four men to Oman and one to Estonia.

A total 28 inmates were transferred out of Guantanamo in 2014.