North Korea vowed to bolster its defenses to protect itself against airstrikes similar to the ones President Donald Trump ordered on Friday against a Syrian airbase.

North Korea called the strikes “absolutely unpardonable,” saying they prove its nuclear weapons are justified to protect the country against Washington’s “evermore reckless moves for a war.”

The comments were made by a Foreign Ministry official and carried Sunday by North Korea’s state-run Korean Central News Agency. The official spoke under anonymity, which is common in KCNA reports.

Advisers said Trump was outraged by heartbreaking images of young children who were among the dozens killed in the Syrian chemical attack and ordered his national security team to swiftly prepare military options.