Emerging deejay Assailant was gunned down in Los Angeles, California, on the weekend.
A former member of Bounty Killer's Alliance outfit, he was 37 years old.
Bounty Killer took to Instagram to pay homage to the late entertainer.
"RIP to a real G @assailant_alliance... Sumfest 06," Bounty Killer captioned a clip.
Shaggy was at a loss for words. He posted: "WTF!".
Assailant was featured on Shaggy's single Party Up, released on June 10.
Producer Skatta Burrell posted: "SIP [Sleep in peace] mi G. This claat mi dung."
According to a report by US authorities, the deejay — whose given name was Omar Thompson — was killed near his car outside a house party in the Encino neighbourhood in Los Angeles, California.
The shooting allegedly took place around 11:40 pm Saturday in the 4500 block of Grimes Place.
Investigations are continuing.
Meanwhile, several other Jamaican entertainers have been extending well wishes since the news broke.
"Jah jah know @grunggaadzilla stay up G," Popcaan commented under Bounty Killer's post.
Reggae singer Nesbeth said, "R.I.P"
One fan by the name of Judah Asante added: "One ah di baddest lyricist of the 2000s. Great is great could a neva underrate. RIP Assailant. Alliance 4 Life."
Members of the Alliance have included Busy Signal, Kiprich, Bling Dawg, Mavada, Vybz Kartel, Aidonia, Angel Doolas, and Elephant Man.
— Kediesha Perry