The report referred to the ammo cooking off (exploding because it was on fire). If that was true it sounds like a KIA tank.
The problem is that any reporter that thought the tank was hit by an RPG probably doesn't really know what cooking off is, so... who knows.
Not necessarily. The M1A has blast doors between the ammo compartment and the crew compartment. It also has blow off doors on the top of the ammo compartment. Rounds cooking off don't really explode like you might think. They do "explode", but the cases aren't all that strong when not supported by the breech and the pressures never get all that high, and the blow off doors further prevent the pressures in the compartment from getting too high. The same thing effect can be seen with common shotgun, pistol and rifle ammunition. Throw it into a fire and you get a "pop" when the case ruptures, and the bullet is not expelled with much force, if at all.
If that was true it sounds like a KIA tank.
At least one of the GW1 "lossed" tanks (stuck in the mud?) was shot by another (not FF, just for demolition purposes) in the ammo compartment, with ensuing "cookoff". It was later recovered and repaired. I can't recall precisely what the source for this info is, maybe one of Tom Clancy's non-fiction books. I'll look it up after dinner.