Naruto Shippuuden episode 125 starts with the ending clip of episode 124. Deidara detonates himself and in attempt to kill Sasuke. The blast is designed to wipe out everything in a very large radius and can be seen from a long distance. Naruto's team watches the explosion in wonder, while Sasuke's team watches in dismay, realizing that the explosion was close to their rendezvous point. In fear that Sasuke may have been killed, Karin checks for signs how his chakra. There are none. Presumably, Deidara, Sasuke, and Tobi have all been annihilated in the blast.
News gets to Akatsuki of the three deaths. There is a brief look of shock on Itachi's face when he hears the news of his brother's death. The other Akatsuki members seem divided on whether to mourn Deidara or Tobi.
Just when you think that Sasuke might really be dead, he reemerges through a summoning spell. Cut up and bruised, he managed to hide himself inside of Manda and use a transportation jutsu to avoid being blow to bits. Unfortunatly, Manda, Orochimaru's favorite pet snake, is a casualty of this move. Either way, Sasuke is badly injured and is taken to rest in the city.