Apple investors call for action over iPhone 'addiction' among children

Open letter highlights growing concern that Silicon Valley is damaging youth and urges new parental controls, child protection committee and release of data

Two of the largest investors in Apple are urging the iPhone maker to take action against smartphone addiction among children over growing concerns about the effects of technology and social media on the youth.

In an open letter to Apple on Monday, New York-based Jana Partners and the California State Teachers' Retirement System (CalSTRS) said the firm must do more to help children fight addiction on its devices.