Israel's spy chief has vowed to make Hamas pay for its terror attack on the Jewish state. 

Mossad director David Barnea also threatened that Israel would target anyone who participated in the October 7 massacre.

Speaking at the funeral of former Mossad chief Zvi Zamir, he said the spy agency was “committed to settling the score with the murderers who descended upon the Gaza envelope on October 7.”

He added: "It will take time, just like after the Munich massacre, but we will lay our hands on them wherever they will be.

"Every Arab mother ought know that if her son participated, directly or indirectly, in the slaughter of October 7, his blood shall be upon his own head.”

His remarks came a day after Saleh al-Arouri, the deputy political chief of Hamas, was killed in a drone strike in a southern Beirut suburb.

Senior Lebanese officials accused Israel of carrying out the strike but Israel has not claimed responsibility.

Hamas, in a statement following the assassination, warned that “all options are open” in response.

Hamas Political Bureau member Azat al-Rishek said that “the cowardly assassinations carried out by the Zionist occupation of the leaders and symbols of our Palestinian people inside and outside of Palestine will not succeed in breaking the will and steadfastness of our people, or undermining the continuation of their courageous resistance.”

Meanwhile, Zamir oversaw Israel's retaliation against Palestinian terrorist groups in the aftermath of the 1972 murder of Israeli Olympic athletes in Munich.

He was also in charge of the agency when Syria and Egypt attacked Israel on October 6, 1973. This marked the start of the Yom Kippur War.