ICC prosecutor 'keeping close eye' on Gaza violence
Fatou Bensouda's warning comes after Israeli warplanes pounded Palestinian targets in the wake of a rocket attack early on Wednesday - the first such incident in weeks.
The ICC launched a preliminary probe in 2015 into allegations of war crimes and crimes against humanity in Israel and the Palestinian territories, in the wake of the Gaza war.
Bensouda said in a statement from The Hague-based court that she was "alarmed by the continued violence, perpetrated by actors on both sides, at the Gaza border with Israel."
"As prosecutor seized of the situation in Palestine, I therefore feel compelled to remind all parties that the situation remains under preliminary examination by my office," she added.
"I continue to keep a close eye on the developments on the ground and will not hesitate to take any appropriate action."
Despite a visit to the region, the ICC has yet to move to the next stage and open a full-blown investigation which could possibly lead to charges being brought.
The issue is highly sensitive, with White House National Security Advisor John Bolton in September having threatened to arrest ICC judges if they moved against Israel or the United States.
Neither Israel or the United States are members of the ICC, which was set up in 2002 to probe the world's worst crimes including war crimes and crimes against humanities.
Gaza's Islamist rulers Hamas have disavowed the latest rocket fire saying they rejected "all irresponsible attempts" to undermine Egyptian efforts to broker a new long-term truce.
But Israel, which holds Hamas responsible for all rocket fire from the territory regardless of who launches it, struck 20 targets in Gaza, killing one Palestinian, according to the Hamas-run health ministry.
Israel also closed both its border crossings with Gaza in reprisal, further isolating the blockaded enclave where deteriorating living conditions have stoked violent protests along the border.
Agencies contributed to this report.
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