Union leaders Monday called off a prolonged strike at South Korea's largest automaker after agreeing to resume negotiations with management on wage increases. Union officials at Hyundai Motor Co. ended a 24-day strike for higher wages, telling workers they were damaging the nation's No. 1 automaker. The leaders said the company had assured them of pay raises. Another Hyundai subsidiary, Hyundai Precision and Industry Co., a major container maker, returned to normal Monday after its 2,000 striking workers ended a 25-day strike with an 18.5 percent pay raise.