Millions of Snapchat users are finding out some of their personal info has been leaked online.
Snapchat is a mobile photo and video sharing service. But whatever you share through Snapchat self-destructs at a time you select.
The usernames and phone numbers for as many as 4.6 million accounts have been downloaded by a website called SnapchatDB.info.
That site claims they stole the database to raise awareness of a security hole with Snapchat. And they've "censored the last two digits of the phone numbers" so as to "minimize spam and abuse".
Snapchat has written a blog post downplaying what happened and saying that it had made some changes to make it more difficult for hackers to do what they did.
To find out if your username and phone number is among those posted online, you can visit a special website and enter your username.