Malacañang said President Ferdinand "Bongbong" Marcos Jr.'s sister, Senator Imee Marcos, is free to investigate in the Senate the events leading to the arrest and transfer of former president Rodrigo Duterte to The Hague.

“We haven't discussed that yet, but if that's what the Senator wants, she is free to do that,” Palace Press Officer Undersecretary Claire Castro said in a Press Briefing on Monday.

The lawmaker earlier said she would seek to probe Duterte’s arrest.

When asked if Malacañang would be ready to send representatives to the Senate once the inquiry begins, Castro said the Palace would provide whatever is needed.

“If necessary. If the inquiry is in aid of legislation, we will respect the request of Senator Imee,” she said.

She also added that it would not exert any effort to prevent resource persons from attending a Senate hearing, an action previously observed under the past administration.

Castro stressed that the government made the arrest of Duterte in accordance with the law.

“I believe, because we just complied with all the requirements, with the law regarding the arrest of former President Duterte,” she noted.

On 11 March, Duterte was arrested by Philippine authorities after his arrival from Hong Kong and was held at Villamor Air Base before being surrendered to Interpol and transported to The Hague to face charges of crimes against humanity in relation to his administration’s controversial war on drugs.

Duterte appeared before the International Criminal Court on Friday via teleconference, with his former Executive Secretary, Salvador Medialdea, serving as his counsel inside the court.

His next appearance is slated to 23 September 2025.