During a press briefing at the Pentagon on Saturday, U.S. officials gave updates on the missile strike on Syrian facilities in retaliation for recent chemical attacks in the region, saying that the strikes “successfully hit every target” and that the U.S., along with British and French allied forces, “took every measure and caution” to avoid civilian casualties.

“I think we dealt them a severe blow,” Lt. Gen. Kenneth McKenzie, director of the Joint Chiefs of Staff, said. “We've attacked the heart of the Syrians' chemical weapons program.”

The strikes were designed to destroy the Assad regime's ability to use chemical weapons, and McKenzie reported that the operation “significantly crippled” storage facilities in Syria, adding that “none of our aircraft or missiles involved in this operation were successfully engaged.”

Watch the opening statements of the Pentagon briefing below:

McKenzie said that 105 missiles were launched by air and sea, targeting three locations in Syria: the Barzah Research and Development Center, the Him Shinshar Chemical Weapons Storage Facility, and the Him Shinshar Chemical Weapons Bunker Facility.

The action was taken in response to evidence that officials say prove that the Assad regime was behind the chemical attack on rebel forces near Damascus. McKenzie emphasized that this strike was “double the size of the last strike in April 2017,” which failed to successfully deter Assad's use of chemical weapons.

“It's intolerable for a civilized nation to use chemical weapons,” Pentagon spokeswoman Dana White said Saturday. “This is a regime that murders its people daily.”

White also called on Russia, an ally of the Assad government, to ensure that the chemical weapons program in Syria is dismantled. She explained that Russian troll activity has increased by 2,000 percent in an effort to spread disinformation after the strikes.

When asked whether the U.S. should expect retaliation from Syrian or Russian forces for the attack, McKenzie stressed that military forces are preparing for the possibility.

“I can't speak to that, but I can tell you that we're ready for it,” he said. “We're postured both in the region and globally ... we're ready for anything.”

President Donald Trump on Saturday praised the military and allied forces for a “perfectly executed strike.”

Trump has been careful to show a tough stance on Syria and has advocated for withdrawing troops from the country. But with the latest strikes, U.S. forces may see an escalation in the conflict.