In a video which showed the execution of a Hamas affiliate, the jihadi group vowed to hit Hamas, which controls much of the Gaza Strip.
Tensions between the rival terrorist organisations heightened since 2015, when ISIS released a video saying it would overthrow Gaza’s ‘tyrants’ for their apparent lack of religious fundamentalism ,Daily Mail reports.
ISIS’s most recent video shows the man, accused of selling weapons to Hamas, on his knees in an orange jumpsuit.
According to Site, a US monitoring agency that keeps track of jihadi platforms, the 22-minute video shows a man, identified as Abu Kazem al-Maqdisi, urging Islamic followers in Gaza to mount attacks on Hamas.
Maqdisi, who is originally from Gaza but now preaches hate in Sinai, says in the footage: “[Hamas] uses its smuggled weapons to empower that which was not revealed by God.
“It also fights supporters of the Islamic State in Gaza and the Sinai and prevents the migration of these supporters from Gaza to the Sinai.”
Towards the end of the recording, the narrator identifies the Hamas collaborator as Musa Abu Zamat.
Zamat is then shot in the back of his head at point-blank range by an Islamist holding a pistol.
One militant steps forward, saying: “Never surrender to them. Use explosives, silenced pistols and sticky bombs.
“Bomb their courts and their security locations, for these are the pillars of tyranny that prop up its throne.”
Hamas has fought three wars with Israel, the last of which was in 2014.