The New Testament accounts say that Jesus was arrested and tried by Jewish religious authorities, specifically the Sanhedrin, who accused him of blasphemy. They then handed him over to the Roman governor, Pontius Pilate, accusing him of sedition and claiming he was a threat to Roman rule by calling himself King of the Jews.
Ultimately, Pontius Pilate ordered Jesus' crucifixion.
There is a long history of debate and differing interpretations regarding the roles and responsibilities of Jewish and Roman authorities in Jesus' death.