Possibly blown KA24DE?

[Dempseybe]

Hey guys, so I picked up a 92 s13 hatch with a rebuilt KA24DE with about 7200 on a fresh rebuild.

Car runs flawlessly except a minor coolant leak on the hose connected to the throttle body. We fixed the leak(thought so atleast)

Well, was on the interstate on my way to work. Car running great, all of a sudden notice a loss in power, first instinct is to look at tempature and sure enough it's over heating. Put it in neutral and go to the emergency lane and it stalls the minute it is out of gear. I allow it to cool down naturally and I insert coolant into radiator and try to start it. The belts and pulleys spin, but it sounds like absolutely no compression. Grabbed my compression check and checked compression in #3 and it read 0

Pretty much all I hear is a starter spinning and no sound of the motor compressing. Will do a more thorough compression check when it is home.