PORT ELIZABETH, Eastern Cape - Workers at tyremaker Continental SA are on strike. Dieter Horni, of Continental SA's MD, said: "We respect the rights of employees to express their grievances through industrial action but protracted action has a detrimental effect not only on production but also on the business. "We look forward to an amicable agreement being reached with the National Union of Metalworkers of SA."NO AGREEMENT REACHEDAn agreement between Numsa and Continental has yet to be reached. Continental said: "We are able to continue with limited production and continue to meet the needs of original-equipment manufacturers as well as the replacement market. However, should the strike continue, it could have a further negative effect on production, including losses experienced to date." Continental Tyre SA employs more than 1600 people.