Both actresses had attended a birthday celebration at a house in L.A. when Pressly's assistant's phone and purse went missing. Using a "find my phone" app, the actress and her assistant tracked the phone to Bootsy Bellows club, where Warren and several others had continued the party.
Warren claimed the phone was hers and "Jaime was trying to get it back," Us Weekly reported. "She wasn't aggressive but she was forceful."
Police were called when drugs were discovered in Warren's bag. It was unclear who the drugs belonged to.
The West Hollywood Sheriff's Department confirmed they had responded to a call at Bootsy Bellows, but declined to share further details as an investigation was ongoing.
2014: The Year in Music [PHOTOS]