Low pressure

I was driving home after work, a light came on in
my car said oil pressure low reduce speed to
25mph the vehicle lost power and I was not able to
get off the highway completely due to other
vehicles, I started the vehicle back and drove down
the street for maybe a couple hundred feet the light
came back on, but this time when the engine lost
power, or right befor it shut down something in the
engine blew, just heard a really loud bang. Smoke
came from under the hood, when I popped the
hood there was fluid all over, what could have
broke?