  AMANDA-II is the largest neutrino telescope collecting data at the moment,
and its main goal is to search for sources of high energy extra-terrestrial
neutrinos. The detection of such sources could give non-controversial evidence
for the acceleration of charged hadrons in cosmic objects like Supernova
Remnants, Micro-quasars, Active Galactic Nuclei or Gamma Ray Bursts. No
significant excess has been found in searching for neutrinos from both
point-like and non-localized sources. However AMANDA-II has significantly
improved analysis techniques for better signal-to-noise optimization. The
km$^3$-scale IceCube telescope will enlarge the observable energy range and
improve the sensitivities of high energy neutrino searches due to its 30 times
larger effective area.
