What was the fate of reform senators Tiberius or the Gracchus brothers?

The brothers Tiberius and Gaius Graccus were not senators. They were plebeian tribunes. Tiberius and some 300 of his followers were clubbed to death by thugs hired by the Senate. His brother revived his reforms, but the senators incited a mob against him and his supporters and also hired mercenary archers. Thousands of supporters were arrested and executed. Gaius fled and was pursued. He then committed suicide. The reforms were shelved.