US Secretary of State Marco Rubio is scheduled to testify before Senate and House committees on 2 June as the conflict with Iran remains a major concern for lawmakers.
Although the hearings are officially focused on the State Department budget, members of Congress are expected to question Rubio on a range of issues connected to the war.
Reports over the weekend about a possible deal to end the conflict prompted mixed reactions among Republicans, with some, including Senator Ted Cruz, urging President Donald Trump not to reduce pressure on Iran.
Cruz sits on the Senate Foreign Relations Committee, where Rubio is due to testify.
Rubio told reporters on Tuesday that talks over extending the ceasefire and reopening the Strait of Hormuz could continue for several more days.
