Social-media app Instagram said a hack it disclosed earlier this week affected a larger number of users than it previously detected. Instagram, owned by Facebook Inc., earlier this week said hackers stole email addresses and phone numbers—but not passwords—tied to some celebrity accounts. On Friday, the photo- and video-sharing app said the theft affected regular users as well and wasn’t just “targeted at high-profile users.” Instagram reiterated that no passwords were stolen. The contact information was