Republicans in the House and Senate are tearing into the Biden administration for unfreezing $6 billion in Iranian assets months before Hamas terrorists launched a deadly and massive attack on Israel early Saturday – criticism that the Biden administration called "false and misleading."

"Just weeks ago, the Biden administration handed over $6 billion to Iran, and today, innocent Israelis were murdered by Iran-backed terrorists," Sen. Marsha Blackburn, R-Tenn., said in a statement. "We must continue to support our strongest ally in the Middle East and their right to defend themselves against these unprovoked, horrific attacks."

Blackburn spoke after Hamas terrorists invaded areas of southern Israel. Thousands of rockets were fired into Israel and dozens of fighters infiltrated through the border. Local Israeli media reported that at least 100 people have been killed in the assault.

AT LEAST 100 DEAD AS HAMAS LAUNCHES UNPRECEDENTED ATTACK ON ISRAEL, NETANYAHU SAYS NATION IS ‘AT WAR’ 

Marsha Blackburn

WASHINGTON - APRIL 19: Sen. Marsha Blackburn, R-Tenn., questions Internal Revenue Service Commisioner Daniel Werfel during the Senate Finance Committee hearing on "The Presidents Fiscal Year 2024 IRS Budget and the IRSs 2023 Filing Season" on Wednesday, April 19, 2023. (Bill Clark/CQ-Roll Call, Inc via Getty Images)

Israeli Prime Minister Benjamin Netanyahu declared that Israel was "at war" and promised that the attackers would pay "an unprecedented price." The White House said that President Biden was briefed "on the appalling Hamas terrorist attacks in Israel."

But Republicans highlighted recent moves by the Biden administration to release $6 billion in frozen Iranian funds as part of a prisoner swap deal. The deal allows the transfer of the money held in a South Korean bank to accounts in Qatar. The administration says the money can only be used for humanitarian purposes and the U.S. will have oversight as to how and when the funds are used. There is no evidence that any of that $6 billion has left the Qatari account as of yet.

"Let's be clear: the deal to bring U.S. citizens home from Iran has nothing to do with the horrific attack on Israel. Not a penny has been spent, and when it is, it can only go for humanitarian needs like food and medicine. Anything to the contrary is false," State Department spokesperson Matt Miller said in a post on X, formerly known as Twitter..

Separately, a State Dept. spokesperson said that the money in the accounts in Qatar "remains in Doha."

"Not a penny has been spent, and it will never go to Iran—it can only be used for future humanitarian-related purposes. Any suggestion to the contrary is false and misleading," they said.

But critics have argued that the money is fungible and could be diverted elsewhere. Iran is a known backer of Hamas and praised the Saturday attacks on Israel. The State Department has previously said that Iran provides some $100 million a year to Palestinian armed groups, including Hamas and Islamic Jihad.

Rockets are fired toward Israel from Gaza, Saturday, Oct. 7, 2023.  (AP Photo/Fatima Shbair)

Republicans in both chambers highlighted the alleged link between the attacks and the funding being unfrozen by the Biden administration.

ISRAELI PM NETANYAHU DECLARES 'WAR AFTER HAMAS TERRORISTS LAUNCH MASSIVE ATTACK: LIVE UPDATES

"This is exactly why so many Americans & Israelis were DISGUSTED to see [President Biden] give the Iranian regime $6 billion last month," Sen. Rick Scott, R-Fla., said on X. "Every dollar given to Iran funds terrorism in the Ayatollah’s quest to destroy Israel. Iran is behind today’s invasion & everyone must say that."

In the House, Rep. Dan Bishop, R-N.C., said that Biden "just gave Hamas sponsor Iran $6 billion." 

"Today, innocent Israeli citizens have paid with their lives for his and the Obama holdovers' venal incompetence," he said.

"This is a clear attack on Israel. We must fully #StandWithIsrael to defend itself & stand strong on the front lines of terrorism," Rep. Chip Roy, R-Texas, posted. "We must act quickly to help Israel & reverse the damage of Biden’s $6BB funding of an Iranian regime backing each of the groups likely involved."

On the campaign trail, Sen. Tim Scott — who is running for the GOP 2024 White House nomination — said that the U.S. "didn’t just invite this aggression, we paid for it."

Who is Hamas' largest funder?

"Iran is the biggest funder of Hamas. This is the Biden $6 billion ransom payment at work," he said.

TED CRUZ SLAMS BIDEN'S $6B IRAN HOSTAGE DEAL AS CRITICS CALL IT A WIN FOR TERRORISTS, PUTIN 

The White House also pushed back against the narrative by Republicans, with Deputy Press Secretary Andrew Bates calling it a "shameful lie in every respect, at a time when both parties should be totally united in supporting Israel's defense."

"Not a cent has been spent -They won't go to the Iranian govt -They can only be used for verifiable purchases of humanitarian needs like food & medicine," he posted on X.

National Security Council spokesperson Adrienne Watson also rejected the connection between the unfrozen payments and the attacks. "These funds have absolutely nothing to do with the horrific attacks today and this is not the time to spread disinformation," Watson posted on X.

Secretary of State Antony Blinken said on Saturday that the U.S. "unequivocally condemns the appalling attacks by Hamas terrorists against Israel, including civilians and civilian communities."  

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"There is never any justification for terrorism. We stand in solidarity with the government and people of Israel, and extend our condolences for the Israeli lives lost in these attacks. We will remain in close contact with our Israeli partners. The United States supports Israel’s right to defend itself," he said.

Fox News' Benjamin Weinthal, Jennifer Griffin and The Associated Press contributed to this report. This story has been updated.