Complex sentence: Khayri who also witnessed the events blamed the riots on Shaikh Isa's administration which he accused of being biased in favor of Najdis, especially since it was headquartered in Muharraq, where groups of armored Najdis had tried to lunch an attack on Manama.
Split into simpler sentences: Khayri who also witnessed the events blamed the riots on Shaikh Isa's administration which he accused of being biased in favor of Najdis. He also noted that Shaikh Isa was headquartered in Muharraq, where groups of armored Najdis had tried to lunch an attack on Manama.