Police have named the four teens who died as Konnor Steele, 16, Indaka Rouse, 16, Kyah Kennedy, 16, all from Bluff and O Maruhuatau Otuwhare Tawhai, 17, from Invercargill.
Emergency services converged on Queens Drive after the crash and were "shook" to find the four teens dead in the cab of the ute.
Tributes and photos have been posted and shared widely of the boys, whose deaths have shaken the Invercargill and Bluff communities.
Police are still working to piece together how the Ford ute they were travelling in collided head-on with a concrete truck on an inner-city street in Invercargill just before 4pm on Friday.
Footage of the immediate aftermath of the crash seen by the Herald showed members of the public, including an off-duty surgeon and nurse, frantically clambering onto the wreckage to try to help.
The Herald has contacted family members but they were not ready to speak publicly.
The driver of the concrete truck also declined to comment.
He was not injured in the crash and was doing "okay" yesterday.
The Herald understands he spent time on his own at the scene of the crash Saturday afternoon after police lifted the cordon and reopened the road.