Sources told Al-Jazeera that Saudi Intelligence had arrested the representative of the secretariat of the Yemeni capital, Sanaa Abdul-Karim Tha'il, from Jeddah airport in mid-March, after returning to Saudi Arabia from a visit to the wounded in Yemen.
The sources added that Saudi Intelligence arrested Tha'il with his wife and son upon their arrival at Jeddah airport, and took him to an unknown location, while his wife and son were transferred to an isolated apartment in Riyadh, where they live in difficult conditions.
And the Geneva-based Sam Organization for Rights and Freedoms has revealed the presence of a number of Yemenis detained in Saudi prisons in difficult circumstances, and said that they include children, women, military and journalists.
There are no accurate statistics on the numbers of detainees, but there are approximately a thousand detainees, according to testimonies of former detainees who spoke about overcrowded prisons in Yemen that lack the most basic conditions and spread diseases.