Any links found on the floor of the hotel room? No? Then it wasn’t a 240.
It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use a rifleman’s magazines as an emergency source of ammunition in the event that he runs out of linked rounds.
https://en.m.wikipedia.org/wiki/M249_light_machine_gun