Palestinian factions trample rights, watchdog group says

(CNN) -- Infighting between the two main Palestinian factions has led to arbitrary arrests, torture and abuse of detainees by both sides, Human Rights Watch said in a report released Wednesday.

Fatah and Hamas "have carried out a wave of unlawful arrests against opponents in recent days," and "Hamas forces physically abused some of the people they apprehended," the group said in its 113-page report.

Fatah supporter Mahmoud Abu Shatat, 23, told CNN he lost his leg after a brutal torture session by members of political rival Hamas. They burst into his home, he says, looking for weapons.

"They shot me in the leg, blindfolded and handcuffed me, beat me, then shot me again," he said.

He said he has no idea why he was targeted, other than for supporting Fatah.

Security forces on both sides act with impunity, the report says.

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