During multiple press interviews on Sunday, Secretary of State Marco Rubio touted alleged progress at President Donald Trump’s summit with Russian President Vladimir Putin, while offering few specifics to back up his claims.

Talks between U.S. President Donald Trump and Russian leader Vladimir Putin produced enough movement to justify a meeting with Ukrainian and European leaders, U.S. Secretary of State Marco Rubio told CBS on Sunday.

Secretary of State Marco Rubio said there wouldn’t be a peace agreement between Ukraine and Russia “unless both sides make concessions.” During an appearance on ABC’s “This Week” on Sunday, host Martha Raddatz asked whether Rubio could name any concessions Russian President Vladimir Putin made during his meeting with President Trump in Alaska on Friday,

U.S. Secretary of State Marco Rubio reacts as he attends a press conference held by U.S. President Donald Trump and Russian President Vladimir Putin following their meeting to negotiate an end to the war in Ukraine,