By Yassin Kombi and Sonia Rolley GOMA, Democratic Republic of Congo (Reuters) - Rwandan President Paul Kagame blasted criticism of his country's role in eastern Democratic Republic of Congo where rebels his government backs have seized its largest city,

Rwanda-backed rebels captured large parts of eastern Congo's largest city including its airport, the United Nations said, as Rwanda's president joined calls for a ceasefire.

U.S. Secretary of State Marco Rubio told Rwandan President Paul Kagame on Tuesday that Washington was "deeply troubled" by escalation in the conflict in the Democratic Republic of Congo, particularly the fall of the city of Goma to Rwandan-backed rebels.