Israeli troops operating against rocket squads in Gaza on Thursday killed a teenager who health officials and witnesses said was hit by shrapnel from a tank shell, then run over by an army bulldozer.
Dr. Moaiya Hassanain of the Health Ministry in Gaza identified the youth as 17-year-old Mahmoud Kassassi. No militant groups claimed him as a member.
The left side of Kassassi's face was crushed.
The Israeli army said it was looking into the reports of the youth's death, which took place during an Israeli incursion into central Gaza. Hamas security forces said dozens of jeeps, tanks and bulldozers moved about 1.5 kilometers (1 mile) into the strip.
Earlier Thursday, two Hamas fighters were seriously injured in clashes with Israeli troops in the same area, Hamas said. The army said troops had been exchanging fire with militants, hitting one.
The Israeli military regularly conducts incursions into Gaza to fight Palestinian militants who fire rockets almost daily at Israeli towns.
On Wednesday, the Israeli government designated Gaza a "hostile territory," threatening to cut back vital supplies of fuel and electricity if the rocket attacks continue. The decision drew condemnation from Palestinians, who said it would deepen the hardship of Gaza's already impoverished residents.