Early on Friday, a U.S. airstrike in Iraq killed Qassem Soleimani, an Iranian general and prominent member of the government.

The Associated Press reports that the U.S. Department of Defense believed Soleimani was “actively developing plans to attack American diplomats and service members in Iraq and throughout the region.”

Supreme Leader Ayatollah Ali Khamenei informed the American government that a “harsh retaliation is waiting.” Six other people were the victims of the American attack.

Check out what Diana had to say:

“I’m deeply concerned by the escalation of violence with Iran that occurred overnight. Congress has the sole constitutional authority to declare war. And while Iran continues to pose a serious threat to our nation’s security, and our interests abroad, no one wants to see America drawn back into a decades-long war in the Middle East … . Congress must be briefed immediately on this situation. We need to know exactly why the administration authorized this attack, and how it plans to protect Americans at home and abroad from its aftermath.” — U.S. Rep. Diana DeGette