Defense Priorities Defense Priorities
  • Policy Topics
    • Israel-Iran
    • Ukraine-Russia
    • NATO
    • China
    • Syria
  • Research
    • Briefs
    • Explainers
    • Reports
  • Programs
    • Grand Strategy Program
    • Military Analysis Program
    • Asia Program
    • Middle East Program
  • Experts
  • Events
  • Media
  • About
    • Mission & Vision
    • People
    • Jobs
    • Contact
  • Donate
Select Page
Home / Israel-Hamas / Hamas leader Ismail Haniyeh was killed in Iran. What happens next?
Israel‑Hamas, Iran, Israel, Middle East

August 1, 2024

Hamas leader Ismail Haniyeh was killed in Iran. What happens next?

By Rajan Menon and Daniel DePetris

Although Israel has not claimed formal responsibility, it’s widely believed that it launched the operation that killed the leader of Hamas’s political wing, Ismail Haniyeh. The fact that Haniyeh was targeted wasn’t a surprise; he had been on Israel’s radar for decades and was almost killed by an Israeli strike in 2003. The surprise was that Israel reportedly targeted Haniyeh in Tehran, hours after he attended the inauguration ceremony of Iran’s new president, Masoud Pezeshkian.

In the hours since, there has been much speculation about the wider consequence of Haniyeh’s slaying. Many observers foresee a war that expands beyond Gaza, which Israel has been attacking since Oct. 7 with the declared aim of destroying Hamas after it launched an audacious attack inside Israel that killed 1,200 people and led to more than 250 being taken hostage (to date, more than 39,400 people have been killed in Gaza, according to health officials there).

The Biden administration is likely planning for the worst, with some U.S. officials expressing concern that Israel’s assassination of Haniyeh could undermine ongoing cease-fire talks and cause the region’s other flashpoints—the Israel-Lebanon border region, for one—to explode.

For Iran, the killing of Haniyeh is, at the very least, a big embarrassment and demonstrated yet again the Iranian security services’ ineptness at securing high-profile people. Haniyeh was a frequent traveler to Tehran, meeting with Supreme Leader Ayatollah Ali Khamenei four times since November. But on this particular occasion he was a formal dignitary at Pezeshkian’s inauguration ceremony and an official guest of the Islamic Republic. The fact that, according to The New York Times, the Israelis were able, undetected, to kill Haniyeh by planting a bomb in a room of a guesthouse that he was known to stay at—and that the Islamic Revolutionary Guards Corps had the responsibility of securing—means that the slip-ups exposed years ago when a top Iranian nuclear scientist was killed in another Israeli operation remain unresolved.

So, what next?

Read at MSNBC

Authors

Photo of Rajan Menon

Rajan
Menon

Former Non-Resident Senior Fellow

Defense Priorities

Photo of Daniel DePetris

Daniel
DePetris

Fellow

Defense Priorities

More on Middle East

ExplainerMilitary analysis, Air power, Basing and force posture, Land power, Naval power

Aligning global military posture with U.S. interests

By Jennifer Kavanagh and Dan Caldwell

July 9, 2025

op-edIsrael‑Iran, Iran, Israel, Middle East

Why the Israel-Iran ceasefire feels like a strategic failure

By Alexander Langlois

July 8, 2025

op-edIsrael‑Hamas, Israel, Israel‑Iran, Middle East

Don’t bet on a Gaza ceasefire

July 3, 2025

op-edIsrael‑Iran, Iran, Israel, Middle East

What lessons are foreign leaders taking from Donald Trump’s Iran bombing?

By Daniel DePetris

July 1, 2025

op-edGrand strategy, China, Iran, North Korea, Russia

There is no ‘axis of autocracy’

By Daniel DePetris

July 1, 2025

In the mediaIsrael‑Iran, Iran, Israel, Middle East, Nuclear weapons

What comes next in the Israeli-Iranian conflict?

Featuring Rosemary Kelanic and Jennifer Kavanagh

June 30, 2025

Events on Israel-Hamas

See All Events
virtualMiddle East, Basing and force posture, Diplomacy, Houthis, Iran, Iraq, Israel, Israel‑Hamas, Military analysis, Syria

Past Virtual Event: Trump in the Middle East: Impacts, implications, and alternatives

May 16, 2025
virtualHouthis, Iran, Israel‑Hamas, Middle East, Yemen

Past Virtual Event: Houthi conundrum: defend, degrade, or defer

March 28, 2024
virtualMiddle East, Iran, Israel‑Hamas, Israel‑Iran, Syria, Yemen

Past Virtual Event: Keeping the U.S. out of war in the Middle East

January 16, 2024

Receive expert foreign policy analysis

Join the hub of realism and restraint

Expert updates and analysis to enhance your understanding of vital U.S. national security issues

Defense Priority Mono Logo

Our mission is to inform citizens, thought leaders, and policymakers of the importance of a strong, dynamic military—used more judiciously to protect America’s narrowly defined national interests—and promote a realistic grand strategy prioritizing restraint, diplomacy, and free trade to ensure U.S. security.

  • About
  • For Media
  • Jobs
  • Donate
  • Privacy Policy
  • Terms and Conditions
  • Contact
© 2025 Defense Priorities All Right Reserved