Pakistan Prime Minister Imran Khan has announced the extension of the nationwide lockdown with relaxation to some sectors.Addressing the media in Islamabad on Tuesday, Khan said, "We made the hard decision of imposing lockdown in the country which was very well implemented due to cooperation of the people."He said that the spread of coronavirus had slowed down to 30 per cent of the projected target, Radio Pakistan reported.The Prime Minister said ventilators, protective clothing, and other gear "have been reaching the country to meet the demand".Imran Khan announced to open the construction industry in cities from today as this has the lowest risk factor in terms of coronavirus spread.Minister for Industries and Production Hammad Azhar said the industries that are exempted from the lockdown are export sector, chemical manufacturing plants, e-commerce, software development and planning, paper and packaging units, industries with labour on-site, cement and fertilizer plants, mines and ..