By 905 Sebük-eri stopped forwarding taxes collected in Fars and Kerman to Zarang. Tahir responded by leading an army against Fars, but was soon persuaded to abort the expedition and return to Sistan, having accomplished nothing.
In 905, Sebük-eri ceased collecting taxes from Fars and Kerman and sent them to Zarang.  Tahir then led an attack on Fars, but ultimately abandoned his campaign after achieving no results and returned to Sistan.