KIEV, Aug. 30 ??“ Russia apologized on Monday for keeping two U.S. senators on the way to Kiev waiting for three hours in a Russian airport after border guards expressed concerns about letting the U.S. military flight depart without an inspection of the plane.

Sens. Richard Lugar, R-Ind., chairman of the Senate Foreign Relations Committee, and Barack Obama, D-Ill., arrived in Ukraine??™s capital later than expected after the delay Sunday in Russia??™s Urals Mountains city of Perm.