White House National Security Council spokesperson John Kirby said he was not aware of any additional attacks over the past 36 hours but cautioned, "We're going to stay vigilant."
Syria's Foreign Ministry on Sunday condemned U.S. strikes, saying Washington had lied about what was targeted and pledging to "end the American occupation" of its territory
The United States will not back away from its nearly eight-year-old deployment to Syria, where it is battling the remnants of Daesh, despite attacks on US forces there last week by Iran-backed militia.