It added that its own committee of inquiry, which includes two international observers, was still at work and that Israel had also agreed to take part in an inquiry set up by the UN Secretary General.
"The report... is as biased and as one sided as the body that has produced it," the statement said. "Israel... is of the opinion that the flotilla incident is amply and sufficiently investigated as it is. All additional dealing with this issue is superfluous and unproductive."
The UN Human Rights Commission earlier said there was "clear evidence to support prosecutions" against Israel over the action of its troops when they stormed a Gaza-bound aid flotilla in May.
In a scathing report, it also threw out Israel's argument that activists on the aid ship were violent thereby justifying the decision to open fire, adding that some were the victim of actions "consistent with...summary execution."
Israel insists that it acted in line with international law, arguing that it had the right to retaliate against ships attempting to breach its blockade of the Gaza Strip, from where Palestinian militants regularly fire rockets and mortar rounds into southern Israel.
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