UN human rights experts said on Wednesday U.S. President Donald Trump's travel ban on nationals from seven Muslim-majority states contravenes international law and could lead to people denied asylum being sent home to face torture.
The government and Callamard have not reached an agreement on her visit after both sides said they are not giving in on each others' terms on the probe.
Delegates have begun arriving in Kazakhstan for peace talks on Syria brokered by Russia and Turkey.
President Rodrigo Duterte took a swipe at a UN official for suggesting he should be charged for murder.
Both parties say they are not giving in on which terms should be followed in the conduct of the probe.
Foreign Affairs Secretary Perfecto Yasay says United Nations Special Rapporteur Agnes Callamard should apologize because her arbitrary findings "unfairly damaged the country."
Deaths involving the state are possibly extrajudicial and must be investigated, says United Nations special rapporteur Agnes Callamard.
United Nations Special Rapporteur Agnes Callamard rejects government's conditions in the probe on the spate of killings.
DFA officials denied reports that the government has cancelled its invitation for UN special rapporteur Agnes Callamard to investigate alleged extrajudicial killings in the country.
Wonder Woman's battle for equality for women and girls at the United Nations has come to a untimely end.
De Lima meets judge who ordered arrest
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Nationwide jeepney strike on Monday
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