People's Liberation Party leader Martha Karua, former Chief Justice Willy Mutunga, and several activists have filed a case against the Tanzanian government at the East African Court of Justice (EACJ).
The leaders, who were among those who were denied entry to Tanzania, are accusing the Tanzanian government of unlawful detention, refusal of entry, and deportation.
Between May 18 and 19, the leaders and other activists, including Gloria Kimani, Lynn Ngugi, Hussein Khalid, and Hanifa Adan, were blocked at the Julius Nyerere Airport and denied entry to the East African country.
They had gone to observe the case of Opposition Leader Tundu Lissu.
