Former president Rodrigo Duterte's initial appearance before the Pre-Trial Chamber I of the International Criminal Court. Handout/ICC

MANILA -- Former President Rodrigo Duterte was happy to learn of his reelection as mayor of Davao City.

According to his youngest brother, Bong Duterte, who visited him in detention at The Hague, the former President was glad to hear the news.

"He's very happy when I told him we got an overwhelming vote as mayor. He smiled," said Bong in a Facebook live video aired by former Presidential spokesman Harry Roque.

The Davao election board has already proclaimed Duterte as the winner of the mayoral race, with the official tally showing that he garnered over 660,000 votes.

Ex-President Duterte defends Davao dynasty from ICC prison  

His youngest son, Sebastian "Baste" Duterte, current mayor of Davao, was declared Davao vice mayor, while his eldest Paolo "Pulong" Duterte, was reelected Congressman. His two grandsons also won in local races.

Bong said he will stay in the Netherlands to look over his brother, who has been jailed by the International Criminal Court due to crimes to humanity. His case is related to extra judicial killings in connection to his administration's "war on drugs."

"He is doing well," said Bong of the former president. "Medyo malungkot lang because he can not (relate) sa outside world talaga so I had to brief him."

Bong said Duterte thanked his supporters who have been staying at the park near the detention facility where is currently staying.

"He would like to thank all those who supported him... I told him merong mga tao sa park," said Bong. "From the bottom of his heart talagang nagpapasalamat siya sa mga sumuporta sa kanya not only sa park, world wide."

It was the first time Bong was able to visit Duterte at The Hague. 

ICC sets deadline to submit observations on Duterte challenge of jurisdiction

During the Facebook Live, Bong reminisced about his last moments with the former president before the arrest. “The last time I saw him sa Davao pa, 'pag nagkukuwentuhan kami sa bahay. It's been a while. Siguro, two months na'ng nakalipas,” Duterte shared.

He acknowledged that he was overwhelmed by the result of the midterm elections, particularly the support of the Davaoeños for his brother.

"I would like to take this opportunity to all the supporters of [F]PRRD. And of course, the Davaoeños who are really solid," said Bong. 

Regarding the results of the "Duter10"—a group of allied candidates—Bong expressed his disappointment that only five out of ten were elected, but he remained optimistic about the possibility of electoral protests. He chose to leave further comments to Vice President Sara Duterte.