Mr. Issa, a presumed planner of the Oct. 7 attacks, is one of the most senior Hamas leaders killed in Gaza since the start of the war.
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Marwan Issa, the deputy commander of Hamasās military wing in Gaza and a presumed mastermind of the Oct. 7 assault on southern Israel, was confirmed dead on Monday by a senior U.S. official after an Israeli airstrike more than a week ago.
With his death, Mr. Issa, who had been among Israelās most wanted men, became the senior-most Hamas leader to be killed in Gaza since the start of the war.
What was Mr. Issaās role in Hamas?
Mr. Issa, who was 58 or 59 at the time of his death, had served since 2012 as a deputy to Mohammed Deif, the elusive leader of the Qassam Brigades, Hamasās military wing. Mr. Issa assumed the role after the assassination of another top commander, Ahmed al-Jabari.
Mr. Issa served both on Hamasās military council and in its Gaza political office, overseen by Yahya Sinwar, the groupās highest-ranking official in the enclave.
Experts described Mr. Issa as an important associate of Mr. Deif and Mr. Sinwar, though they said his death did not represent a threat to the groupās survival.
Michael Milshtein, a former Israeli military intelligence officer and an expert on Palestinian affairs, said Mr. Issaās death was a significant blow to the Qassam Brigades, though he conceded it wasnāt āthe end of the worldā for Hamas.
āHe had a lot of experience,ā Mr. Milshtein said. āHis death is a big loss for Hamas, but it isnāt a loss that will lead to its collapse and it wonāt affect it for a long time. In a week or two, theyāll overcome it.ā
Mr. Milshtein added that even though Mr. Issaās opinion was valued at the highest levels of Hamas, the fact he did not directly command fighters meant his death did not leave a gaping hole in Hamasās operations.
Gerhard Conrad, a former German intelligence officer who met Mr. Issa more than a decade ago, described him as a ādecisive and quietā person lacking charisma. āHe was not very eloquent, but he knew what to say, and he was straight to the point,ā Mr. Conrad said in an interview.
Mr. Conrad said he met Mr. Issa, Mr. al-Jabari and Mahmoud al-Zahar, another senior Hamas official, about ten times between 2009 and 2011 in Gaza City. The men met as part of an effort to broker a prisoner swap between Israel and Hamas.
āHe was the master of the data on the prisoners,ā Mr. Conrad said of Mr. Issa. āHe had all the names to be negotiated on.ā
Mr. Conrad, however, said it was apparent at the time that Mr. Issa was a subordinate to Mr. al-Jabari. āHe was a kind of chief of staff,ā he said.
It was only after Mr. al-Jabariās assassination that Mr. Issaās prominence grew, but he still was keen to stay out of view. Few images of Mr. Issa are in the public domain.