Big Sean, 27, reportedly took to Twitter to threaten Justin Bieber, 21, after the latter hugged Ariana Grande, 21, during a performance in Los Angeles.
On April 8, Wednesday, Bieber threw his arms around Grande's waist during their performance of the song "As Long As You Love Me."
After this, Big Sean tweeted "Wow" and "This kid is about to learn not to touch my girl like that. Beliebe that" but deleted them just minutes after posting them, according to Hollywood Life.
One of Big Sean's most recent tweets reads, "so many times in my life I wish I could of been at 2 places at once."
Bieber, Grande and Big Sean are yet to comment on the issue.
Aside from "As Long As You Love Me," Bieber and Grande also performed "Love Me Harder" and "Where Are U Now" in Los Angeles.
In March, Bieber also performed "Love Me Harder" with Grande in Miami. At the time, the Canadian pop star messed up with the lyrics so he apologized after the performance, according to People.
"So I feel bad, I forgot the words, Ariana," Bieber apologized. "I've been trying to memorize them backstage for like an hour."
Grande told him nobody heard before they performed "All That Matters" together.
Released by Republic Records, "Love Me Harder" is from Grande's second studio album titled "My Everything." It peaked on the Billboard Hot 100 chart at number seven.
The song also features Bieber's fellow Canadian musician The Weeknd, who co-wrote it with Ali Payami, Peter Svensson, Ahmad Balshe, Savan Kotecha and Max Martin.