Currently, I heard about 419 cybercriminals , there were many facebook account affected by 419 scams.
The 419 is categorized as cybercriminals by using Facebook in an attempt to trick your friends into sending them money. The 419 scams works by controlling your facebook acount and use chat or status feature to claim that you are stuck in a far away location and in need of financial assistance.
It is possible that your email account was compromised as well, as obtaining access to a victim’s email is one of the primary ways thesecybercriminals have been operating. Please take the following steps to ensure the security of your Facebook account:
1. Select a unique and complex password for your Facebook account and keep this entirely to yourself.
You can do this from the Account Settings page of your Facebook account or by using the "Forgot Password" link on the login page.
2. Select a new, unique password for any email address associated with your account, making sure to avoid using the same password for any account.
3. Verify that you control all of the email addresses associated with your account on the Contact Email section at:
https://www.facebook.com/editaccount.php
4. Add a security question to your account from the Account Settings page if you have not done so already.
5. Visit the following page for more information about Facebook security and how to report suspicious material:
http://www.facebook.com/security
If you require further assistance in securing your account, please enter your account information in this form so that we can make sure your account is secure.