Yes. Maranzano was having tax troubles, and was expecting an audit by IRS agents any day. For that reason, he warned his associates and bodyguards not to carry weapons in his office. Tommy Lucchese tipped Charlie Luciano to those facts, and Luciano reached for his pal Meyer Lanksy to put together a hit squad of non-Italian-looking (i.e., Jewish) gangsters sporting Treasury Department badges.
The irony is that Maranzano had been planning to whack Luciano. Even as Lansky's killers were exting via the stairs after assassinating Maranzano, Vincent (Mad Dog) Coll, an Irish freelance killer hired by Maranzano, was waiting for the elevator in the lobby to bring him to Maranzano for his last instructions before setting off on his lethal mission.