Apple has said it will aid in the investigation of the death of a Chinese woman who was allegedly electrocuted when she answered a charging iPhone 5.

In an e-mail sent to Reuters, Apple said the company is "deeply saddened" by the "tragic incident" that killed 23-year-old Xinjiang woman Ma Ailun. Apple vowed to "fully investigate and cooperate with authorities in this matter."

Police say Ma was killed when she answered a call on her charging iPhone 5. The story gained traction when her sister wrote on the microblog Sina Weibo to warn other users to be careful.

Prior to the incident in China, there have been no widespread claims about faulty charging with the iPhone 5. Apple did recall iPhone 3G power adapters back in 2008 over a shocking risk that affected just a "very small" number of adapters.