TMZ has learned … Minaj was hanging out at the pool at the fancy Palomar Hotel when she got into a very intense verbal spat with an unidentified man she was staying with.
Nicki told a hotel employee to call police … while the man went to their hotel room. Nicki followed soon after.
When cops and paramedics arrived, Nicki told authorities their poolside fight continued inside of their room … and the man hit her in her lower lip.
The man had already left the scene when cops arrived … but Nicki insisted she did NOT want to press charges. Nicki also claimed she was NOT in a relationship with the alleged attacker.
Cops tell us an incident report was taken … but no charges will be filed per Nicki’s request.
Calls to Nicki’s rep have not been returned.