In the oil refinery Tüpras in Izmit, three workers died in an explosion, which took place at works of removing tanks of tetra-ethyl lead. Meanwhile 5 of the 7 workers hurt in the explosion left the hospital already, the situation of two of them remains critical. Salih Efe of the trade-union Petrol-Is said that the gas, which was set free at the explosion is toxic and explained that the incident happened in an area where outsourced enterprises work and that a foreign company was affected.