Secretary of State Marco Rubio warned Tuesday that the United States will end mediation unless Russia and Ukraine make "concrete proposals" on ending the war, his spokeswoman said.

When pressed for evidence about why activist Mahmoud Khalil was arrested by immigration authorities last month, the Department of Homeland Security shared a two-page memo from Secretary of State ...

The U.S. and India have long sought justice for the victims of the 26/11 Mumbai attacks and with the extradition of accused Tahawwur Rana, that day has come, U.S. Secretary of State Marco Rubio ...