Activist Hishamuddin Rais was called in for questioning at the Sentul police headquarters on Tuesday over a post in his blog, Tukar Tiub, published on September 18, which called for a Royal Commission to be set up to investigate Datuk Seri Abdul Azeez Abdul Rahim for allegedly bribing a senior Malaysian Anti-Corruption Commission officer to cover up the allegations made against the former Tabung Haji chairman.