Boston Marathon bomber Dzhokhar Tsarnaev
Boston Marathon bomber Dzhokhar Tsarnaev (L) is shown in a courtroom sketch next to Judge George O'Toole. He was found guilty of all 30 charges brought against him. Reuters

The jury in the Boston Marathon bombing trial of Dzhokhar Tsarnaev reached a verdict after just 12 hours of deliberations.

In verdicts read on 8 April, Tsarnaev was found guilty to all charges. He will head to the second phase of the trial to find out whether he gets life in prison or the death penalty.

Tsarnaev was charged with 30 federal charges, with 17 of those carrying the death penalty. The 21-year-old was accused of killing three people and injuring more than 260 using two pressure-cooker bombs during the 2013 Boston Marathon along with his now-deceased brother Tamerlan. The brothers later allegedly killed MIT police officer Sean Collier when they attempted to evade police.

Tsarnaev pled not guilty to all counts, despite his lawyer Judy Clarke admitting he did commit the attacks during her opening statement.

Jury deliberations began on 7 April after both the prosecution and defence gave their closing arguments. The jury is set to begin the second phase of the federal trial to decide whether Tsarnaev will be sentenced to life in prison or given the death penalty.

Given his guilty verdict on just the first count, Tsarnaev is now eligible to receive the death penalty in the next phase.