At least four explosions rocked Gaza City early Sunday, targeting cars belonging to officials from Islamic factions, including the territory's Hamas rulers.
The charred vehicles were parked outside the houses of the local officials in the Sheikh Radwan neighborhood. Khader Mahmoud, a 32-year-old witness, said the blasts occurred seconds apart from each other, just after 6 a.m.
There was no immediate claim of responsibility.
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Five cars that belonged to two local political groups, the Islamic Jihad and Hamas military wing, exploded after bombs underneath the cars were detonated, a spokesman for the Hamas-run Interior Ministry told NBC News.
"Security forces found small Daash (ISIS) flags near some of the cars. Security forces are conducting an investigation and they are convinced they will find the criminals. There were no injuries but one house was burnt," said Iyad Basson, the spokesman, in a statement.
Ayman Sahabani of Gaza City's Shifa hospital said the blasts slightly wounded a young woman and a man.
Hamas recently launched a fierce crackdown on alleged ISIS supporters.
Extremists in Gaza inspired by the Islamic State group have attacked Hamas positions in the past and have also fired rockets at Israel in an attempt to undermine Hamas by violating the cease-fire between Israel and Hamas that followed last year's war. The extremists believe Hamas is soft on Israel and has failed to properly establish Islamic rule in the territory.