<p>Samsung Group heir Jay Y. Lee on Tuesday was summoned and questioned by prosecutors over a controversial 2015 merger of two of the group's affiliates, Yonhap News Agency said.</p>.<p>A Samsung Electronics spokesman declined to comment. Prosecutors were not immediately available for comment.</p>
<p>Samsung Group heir Jay Y. Lee on Tuesday was summoned and questioned by prosecutors over a controversial 2015 merger of two of the group's affiliates, Yonhap News Agency said.</p>.<p>A Samsung Electronics spokesman declined to comment. Prosecutors were not immediately available for comment.</p>