Here is what happened. One tank broke down and the other towed it. M1s have turbine engines which run hot. When towing an M1 with another M1 the crews are supposed to employ a blast deflector. They did not. This occurred in Iraq and the ambient temp was over 120 degrees F.
An American Abrams tank destroyed in Baghdad On the road to Baghdad, a US Marine Corps (USMC) Abrams Main Battle Tank (MBT) lay destroyed after a firefight with Iraqi troops, during Operation IRAQI FREEDOM.
Catastrophic penetration suffered to a Sturmgeschütz III (StuG III) assault gun. The anti-tank round has penetrated the outer armor sheets and has exploded the gun compartment. Crew almost certainly perished.