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U.S. Ambassador to the U.N. Samantha Power raises her hand in a vote during the Security Council meeting on the Ebola crisis at the U.N. headquarters in New York Thursday. Reuters/Shannon Stapleton

U.N. Ambassador Samantha Power said Sunday other countries are willing to participate in airstrikes against the Islamic State in Syria. "We will not do the airstrikes alone," Power said in making the rounds of the Sunday talk shows.

On CBS "Face the Nation," Power said the United States has received indications other countries are willing to participate as part of an international military, political and financial coalition to defeat the murderous militant group also known as ISIS. She said, however, she would leave it to the individual nations to make the announcements themselves.

World leaders are due in New York this week for the U.N. General Assembly.

The United States began conducting airstrikes in Iraq against the Islamic State, also known as ISIS, last month and in retaliation, the militants beheaded two American journalists and a British aid worker, threatening to behead a second Briton as well unless the bombings stop.

President Obama announced earlier this month airstrikes could expand into Syria, and the United States would begin arming moderate Syrian rebels. He said 1,600 U.S. troops would be dispatched to Iraq. Congress last week approved $500 million for the effort to train the Syrian rebels.

Power told ABC "This Week" other nations support going after ISIS.

"I will make you a prediction," Power said on ABC. "We will not do the airstrikes alone if the president decides to do the airstrikes."

"The risk is that the United States begins getting involved in what may be a very long term commitment to a messy civil war in Syria," Sen. Chris Murphy, D-Conn., told NBC's "Meet the Press." Murphy, a member of the Foreign Relations Committee, voted against the aid package.

Sen. Ron Johnson, R-Wis., another member of the committee, said he doubts aid and airstrikes will suffice.

"I'm just not seeing the strategy that's actually going to work," he told NBC.