Starting at 02:30 OT, Consiglio shot and killed Merovingians.

The general consensus is that this was the result of the hijack by a player from Gambino some hours earlier. A couple of versions ago Merovingians and Gambino were close (though they are not anymore now, on the contrary), so Consiglio shot them because of that connection - as a revenge, or maybe even as a precaution.

Mind, this is all hearsay, and not the official Consiglio statement.