He was the younger brother of Yahya Sinwar, the former Hamas leader killed by Israel last year. Hamas did not immediately respond to the claim of his death.

Israel announced Saturday it had killed Mohammed Sinwar, the chief commander of Hamas’s military wing and younger brother of slain militant leader Yahya Sinwar.

In addition to Sinwar, the airstrike killed the commanders of Hamas's Rafah Brigade and South Khan Yunis Brigade. Mohammed Sinwar, head of the Hamas military wing, was killed in an Israeli airstrike on May 13 in Khan Yunis,