  We consider a four flavour scenario for the neutrinos where an extra sterile
neutrino is introduced with the three families of active neutrinos and study
the deviation from three flavour scenario in the ultra high energy (UHE)
regime. We calculate the possible muon and shower yields at a 1 Km$^2$ detector
such as ICECUBE for these neutrinos from distant UHE sources namely Gamma Ray
Bursts (GRBs) etc. Similar estimations for muon and shower yields are also
obtained for three flavour case. Comparing the two results we find considerable
differences of the yields for these two cases. This can be useful for probing
the existence of a fourth sterile component using UHE neutrino flux.
