He had already sent people out to search, but they found nothing. Naruto seemed to have vanished into thin air, leaving not a single trace.
Moreover, he later learned from Konoha's shinobi that during his fight with Naruto, a massive number of Naruto's clones had been running all over Konoha, draining blood from members of all the major Konoha clans, as well as ordinary civilians.
Multiple Shadow Clones — how on earth did he not know Naruto could use this ninjutsu?
Chapter 98