Nobel Laureate Machado's Oslo Journey Amid Tensions
She has been in hiding since August 2024.
Opposition activists in Venezuela have been subdued after 2,400 arrests linked to Nicolas Maduro's re-election.
Harpviken confirmed her attendance but cannot disclose arrival details due to security.
Venezuela's attorney-general, Tarek William Saab, accused Machado of being a fugitive and of conspiracy, incitement, and terrorism.
Her stance aligns with increased U.S. military activity in the region.
She dedicated the prize to the suffering Venezuelan people and praised U.S. President Trump's support.