Egyptian authorities detained a journalist working for a fact-checking platform following its coverage of a plane that was seized in Zambia along with its suspicions cargo after making a stop in Cairo, the outlet said. Security forces arrested Karim Asaad Saturday from his home in al-Shorouk neighborhood in eastern Cairo, the platform, Matsda2sh, or Don’t Believe, said in a statement.

The platform accused security forces of assaulting Asaad’s wife and threatening their child while detaining the journalist. Asaad's whereabouts remained unknown, it added. There was no immediate comment from the government. The platform said security forces asked Asaad about its extensive coverage of a mysterious plane intercepted in Zambia earlier this month after making a stop in Cairo.

Zambian authorities said they found over USD 5 million in cash and more than 100 kilograms of suspected gold mixed with zinc, copper, and nickel on board the aircraft.

Zambian authorities said six Egyptians were detained along with four from Zambia, Netherlands, Spain and Latvia in relation to the mysterious plane.

Matsda2sh is a social media platform that focuses on debunking misinformation. The platform says its journalists are “independent” and “hide their identities” for safety reasons.