The Akal Takht, the highest temporal seat of the Sikh religion located in the Golden Temple complex, on Sunday demanded the closure of all Dera Sacha Sauda campuses in Punjab after a controversy over the sect's head led to sectarian clashes in the state. Rejecting Dera Sacha Sauda's apology, Akal Takht also called for a Punjab bandh on May 22 in protest against the Dera chief's "act of blasphemy" by posing in the attire of Guru Gobind Singh.