By Stanley Widianto, Stefanno Sulaiman and Yuddy Cahya Budiman MALANG, Indonesia (Reuters) – A stampede at a soccer stadium in Indonesia has killed at least 125 people and injured more than 320 after police sought to quell violence on the pitch, authorities said on Sunday, in one of the world’s worst stadium disasters. Officers fired tear gas in an attempt to disperse agitated supporters of the losing home side who had invaded the pitch after the final whistle in Malang, East Java, on Saturday night, the region’s police chief Nico Afinta told reporters. “It had gotten anarchic. They started at…