Hyundai Motor...filed a police complaint against 13 activists it says led a violent clash at its biggest assembly plant that left 82 employees injured. The three-hour dispute...between activists from the Korean Confederation of Trade Unions...and Hyundai security guards and managers caused about...$2 million...in damage...[Hyundai Motor said] About 100 people were injured in total, the trade union said...The company filed a complaint to Ulsan district police...for obstruction of business and acts of violence...The police will begin an investigation...“We are closely monitoring the situation,”...a spokesman for the Korean Confederation of Trade Unions, said...