Sayfullo Saipov, an Islamic extremist who drove a truck along a bike path, killing eight people and injuring several others, will spend life in prison without the possibility of parole.
The prosecutors sought the death penalty, but a split jury could not reach a unanimous decision.
Saipov was convicted on 28 charges in January, including murder and supporting a terrorist organization.
Sayfullo Saipov, a native of Uzbekistan, was convicted of killing eight people in a 2017 terrorist attack on a bike path in New York City.
He was charged with 28 counts, including providing material support to a terrorist organization and murder in aid of racketeering.
The prosecutors sought the death penalty, but the jury failed to reach a unanimous decision, resulting in Saipov getting an automatic sentence of life in prison without parole.
The trial was seen as a key test for the Biden administration's stance on capital punishment, with the Department of Justice pushing for execution despite Biden's opposition to the death penalty.
The New York Times writes that the verdict is the first federal death penalty trial held during the Biden administration.
Various sources report emotional testimonies from Saipov's victims and survivors with some noting that Saipov smiled, gave a "proud confession," and requested an ISIS flag to hang in his hospital room where he was being treated after the attack.
As reported by Reuters, it was not clear whether deliberations were completed, but a unanimous decision was required to impose the death penalty.
The BBC News highlights that the same jury that convicted Saipov in January deadlocked over how he should be punished.
The terrorist will spend his sentence at the most secure prison in the US, the supermax facility in Colorado, according to the BBC News.