At least six workers and two senior officers of Rourkela Steel Plant (RSP) in Orissa's Sundergarh district fell ill on Sunday following leakage of toxic gas in one of its blast furnaces. The affected persons were immediately admitted to the Ispat General Hospital at Rourkela. While four of them were discharged after first-aid treatment, the rest were shifted to the intensive care unit as their condition worsened, a RSP spokesman told this newspaper. "The employees undergoing treatment are now out of danger," RSP chief of communication, Rahman Khan said.