WASHINGTON — President Donald Trump called the military strikes on Syria "perfectly executed."
Trump tweeted Saturday morning, "Thank you to France and the United Kingdom for their wisdom and the power of their fine Military. Could not have had a better result. Mission Accomplished!"
On Friday, the president said the United States “launched precision strikes” on targets associated with Syrian chemical weapons program.
Trump said the strike was a joint effort with France and the United Kingdom in a speech Friday night.
"A short time ago, I ordered the United States Armed Forces to launch precision strikes on targets associated with the chemical weapons capabilities of Syrian dictator Bashar al-Assad," Trump said. "A combined operation with the armed forces of France and the United Kingdom is now underway."
Trump said that the "massacre" last weekend in Syria "was a significant escalation in a pattern of chemical weapons use by that very terrible regime."
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"The evil and the despicable attack left mothers and fathers, infants and children thrashing in pain and gasping for air. These are not the actions of a man," Trump said, referring to Assad. "They are crimes of a monster instead."
Trump also delivered a message to Iran and Russia.
"To Iran and to Russia I ask, what kind of a nation wants to be associated with the mass murder of innocent men, women and children? The nations of the world can be judged by the friends they keep. No nation can succeed in the long run by promoting rogue states, brutal tyrants, and murderous dictators," Trump said.
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In a briefing shortly after the president's address, Defense Secretary James Mattis said the strike demonstrates the international resolve to prevent the use of chemical weapons, saying he is "confident the Syrian regime conducted a chemical attack on innocent people in the last week."
"Clearly the Assad regime did not get the message last year," Mattis said, adding that this time the U.S. struck harder.
"We have gone to great lengths to avoid civilian and foreign casualties," he said. "... I believe that we sent a very strong message."
Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford said the strike specifically hit three targets associated with the production and storage of chemical weapons: a scientific research center; a storage center for sarin and its precursor components; and a chemical weapons storage facility and command post.
"Important infrastructure was destroyed," said Dunford.
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There were no reports of American losses, Mattis said.
Russia was not notified before launching airstrikes against Syria, Dunford said, adding no additional strikes were planned at this point.
The Associated Press and ABC News contributed to this story.