Zimri-Addu added in 27 158 information that they brought Rim-Sin and his belongings to Babylon….. Zimri-Addu had been instructed by Zimri-Lin to bring the Mariote and the Babylonian troops that had been promised by Hammu-Rabi to Mari as soon as Larsa fell. He quoted this instruction in 27 157, and, while he did not state that he was unable or felt unable to do so, this must have been the case… he wrote in 27 158 to report that the Babylonian army was taking down the defenses of Larsa… It appears that Hammu-Rabi was not ready or willing to send the Mariote troops home or to send a contingent of his own shock troops along.
Wolfgang Heimpel, ibid., pp. 155-6
For comparison, this is Van De Miercoop’s synopsis of the same letters:
So, Rim-Sin was able to escape, but not for long. Another letter announces that he was captured and sent to Babylon together with members of his entourage. Hammurabi tore down the city walls of Larsa, but did not raze the city.