Here are some reactions to the killing of Iranian Major-General Qassem Soleimani, head of the elite Quds Force, in a U.S. air strike on his convoy at Baghdad airport.
US Senator Chris Murphy
Murphy, a Democrat, said while Soleimani was "an enemy of the United States," the killing could put more Americans at risk.
"One reason we don't generally (assassinate) foreign political officials is the belief that such action will get more, not less, Americans killed," Murphy said on Twitter.
"That should be our real, pressing and grave worry tonight."
Former US ambassador to the United nations Nikki Haley
"Qassem Soleimani was an arch terrorist with American blood on his hands," Haley said on Twitter. "His demise should be applauded by all who seek peace and justice. "Proud of President Trump for doing the strong and right thing."
Mohsen Rezaei, Commander of Iran's Mohsen Rezaei, Former Commander of Iran's revolutionary guards