Officials said the men are being questioned for alleged illegal activity in the Gulf nation that is due to hold the 2022 World Cup.
The Norway-based Global Network for Rights and Development reported that its researcher Krishna Upadhyaya, 52, and photographer Ghimire Gundev, 36, went missing on August 31 as they were preparing to leave Qatar.
It suggested that Qatari security services were behind their disappearance and has called for their release. Amnesty International has urged Qatari authorities to reveal the men’s whereabouts and ensure their safety.
Qatar’s Foreign Ministry said they had ben arrested and “are being interrogated for having violated the provisions of the laws of the state of Qatar”.