ISTANBUL (AP) — Thousands of people have gathered in Istanbul for the funeral of a Turkish teenager who died nine months after slipping into a coma from being hit by a police tear-gas canister during anti-government protests.

A US financial regulator warned consumers Tuesday that using the online currency Bitcoin is fraught with risks including theft by hacking and fraud. The Financial Industry Regulatory Authority issued the general warning amid a spate of scandals involving the digital currency, which has rocketed in popularity and been the focus of much speculation over the past two years. "Buying and using digital currency such as Bitcoin carry risks. Speculative trading in bitcoins carries significant risk," FINRA said.

Controversial US author Joe McGinniss, who pushed the boundaries of journalistic convention, at times becoming nearly as notorious as his subjects, has died. News reports said McGinniss passed away Monday at a hospital in Worcester, Massachusetts. McGinniss's unique literary niches included America's political leaders, as well as country club psychopaths. He first made his mark as a writer in a groundbreaking, behind-the-scenes exploration of Richard Nixon's successful White House run, "The Selling of the President 1968."