U.S. Secretary of State Marco Rubio has said that the U.S. is expecting a response on Friday from Iran on the proposal to end the war.

“We should know something today... We’re expecting a response from them,” Rubio told reporters in Rome, Italy, on Friday while visiting the Pope, when asked about the status of negotiations with Iran.

“We’ll see what the response entails. The hope is it’s something that can put us into a serious process in negotiation.”

Iran said Thursday it is reviewing messages from the U.S. received via Pakistani mediators, but it has yet to reach a conclusion or deliver a reply, according to Iranian state media, citing an Iranian official.

Axios and other news outlets reported earlier this week that the countries were nearing a 14-point memorandum of understanding to put an end to the war and resume talks around Iran’s nuclear program.