From Hamas' Qassam website:
Ezzedeen Al Qassam Brigades mourned, on Wednesday evening, one of its field leaders from Rafah city southern Gaza Strip, who was martyred in an accidental explosion during preparation work for resistance.Haaretz reports that this was no ordinary Hamas terrorist, but "a senior figure in Hamas' explosives division" who had survive three Israeli assassination attempts.
The Brigades said in a statement that the Qassam leader Ibrahim Hussein Abu Naja, 51 years, from Rafah, martyred, on Wednesday evening, 07/06/2017 in an accidental explosion.
The Brigades added: "Ezzedeen Al-Qassam Brigades mourns the death of the mujahed, reaffirms the commitment and determination to continue the resistance against the belligerent occupation forces".
His funeral was attended by hundreds:
May there be many more such martyrs.