The two metal frontmen are said to have come to blows after Manson started his show at Michigan's DTE Amphitheater late on Friday (October 12).
Due to his lateness, he was forced to cut his setlist short, and apparently told the crowd that he was "going to beat [Zombie]'s ass", reports Bloody Disgusting.
Zombie later cursed Manson throughout his set, continuously shouting "F**k you Marilyn Manson" during his cover of Alice Cooper's 'School's Out'.
The singer and director later took to his Facebook page to voice his surprise and disappointment at his co-headliner's behaviour.
"Unfortunately things turned ugly backstage," he wrote. "Why? I don't know, but for some reason our touring partner decided to end his set by blaming me for something that I had nothing to do with and screaming he was going to 'kick Rob Zombie's ass as soon as he got off stage'.
"Go figure. I was backstage hanging, watching the show thinking, 'Hey this is gonna be a great night', when suddenly he starts screaming threats. So strange. I don't get it. Christ, I've known some of his crew for 20 f**king years and some of his crew used to work for me. It's all good. No one would f**k with someone's show. It is ridiculous.
[Video: Rob Zombie curses at Marilyn Manson on stage]
"Well, of course I felt the need to respond to the 'kick my ass remark'. Who wouldn't? Although I wish I had kept it backstage and kept the fans out of it. It is all 4rd grade fight after school nonsense of which I have never dealt with on tour before. Co-headlining tours always go smooth because everything is cut 50/50 and I mean everything. No one f**ks with anyone's show. It is even f**king Steven."
He continued: "I've done it co-headlining tours many times before and have had no troubles. Not with Pantera, Slayer, Alice Cooper, Korn, Megadeth or anyone ever. So I didn't expect any troubles on this. It seemed like a great idea at the time.
"But s**t happens. Anyway, sorry to the fans who had to dealt with the embarrassing stupidity of it all. We are all there for the same reasons to give you the best show ever… that's it."
Marilyn Manson and Rob Zombie's joint tour is scheduled to come to the UK in November.
The pair will perform at:
London TBC (November 26)
Manchester Arena (27)
Glasgow SECC (28)
Birmingham NIA (29)
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