When I login to Facebook it says Working in this Page.

When I login to Facebook with my correct username and password the link redirects me to a page on which it is written like:
"The Page you are requesting is temporarily down. Please try after sometime. We are working on your Account.
But when I again log in with correct username and password it takes me to my homepage on www.facebook.com.
I am curious to know that what could be the possible reason behind it.Is it a security breach. Is my account secure or its been hacked?
