Human rights activist Hussein Khalid has been detained by Tanzanian authorities at the Horohoro border post.
The Haki Africa executive director was detained after demanding the release of Hamisi Madilo, who had been held for nine days by immigration officials.
Trouble started when the authorities brought Madilo to the Horohoro border post after being released by the authorities.
However, he was immediately re-arrested after meeting his family, including wife Zetuni Chimako, and father Mohamed Mbetsa, and Haki Africa officials.
Tension began after Khalid demanded to know why Madilo was re-arrested even after intervention from Kenyan Foreign Affairs CS Monica Juma.
Haki Africa said Madilo was secretly moved from the Horohoro border post after re-arrest and taken to Tanga.
“HAKI Africa demands the immediate release of Hamisi and Hussein Khalid,” said Haki Africa rapid response Mathias Shipeta.