Twitter Inc. is parting ways with Aliza Knox, head of the social media service's Asia-Pacific operations, TechCrunch reported April 4.

Knox is stepping down from her position after more than four years and will be replaced by Maya Hari, who has served as Twitter's managing director for India and Southeast Asia.

Knox joined Twitter in November 2012 and launched the company's operations in the region, beginning with an office in Singapore.