  The MAGIC collaboration has recently reported the discovery of gamma-ray
emission from the binary system LS I +61 303 in the TeV energy region. Here we
present new observational results on this source in the energy range between
300 GeV and 3 TeV. In total 112 hours of data were taken between September and
December 2006 covering 4 orbital cycles of this object. This large amount of
data allowed us to produce an integral flux light curve covering for the first
time all orbital phases of LS I +61 303. In addition, we also obtained a
differential energy spectrum for two orbital phase bins covering the phase
range 0.5<phi<0.6 and 0.6<phi<0.7. The photon index in the two phase bins is
consistent within the errors with an average index
Gamma=2.6+-0.2_{stat}+-0.2_{sys}. LS I +61 303 was found to be variable at TeV
energies on timescales of days. These new MAGIC measurements allowed us to
search for intra-night variability of the VHE emission; however, no evidence
for flux variability on timescales down to 30 minutes was found. To test for
possible periodic structures in the light curve, we apply the formalism
developed by Lomb and Scargle to the LS I +61 303 data taken in 2005 and 2006.
We found the LS I +61 303 data set to be periodic with a period of (26.8+-0.2)
days (with a post-trial chance probability of 10^{-7}), close to the orbital
period.
