The deputy chief of Hamas on Wednesday condemned the killing of six men accused of collaborating with Israel Maan reported.
Resistance leaders should use legal procedures to deal with suspected spies through the courts, Mousa Abu Marzouq wrote on his Facebook page.
On Tuesday, Gunmen shot dead six alleged collaborators and chained the body of one of them to a motorcycle before dragging it throughout the main streets of Gaza City.
Abu Marzouq said the killings were "not acceptable at all" and that those responsible for the killings must be held accountable. The incident "must never happen again," he added.