We analyzed archival Chandra X-ray observations of the central portion of the 30 Doradus
region in the Large Magellanic Cloud. The image contains 20 X-ray point sources with
luminosities between 5x1032 and 2x1035 erg/s (0.2 to 3.5 keV). A dozen sources have bright
WN Wolf-Rayet or spectral type O stars as optical counterparts. Nine of these are within about
3.4 pc of R136, the central star cluster of NGC 2070. We derive an empirical relation between the
X-ray luminosity and the parameters for the stellar wind of the optical counterpart. The relation
gives good agreement for known colliding wind binaries in the Milky Way Galaxy and for the
identified X-ray sources in NGC 2070. We conclude that probably all identified X-ray sources in
NGC 2070 are colliding wind binaries and that they are not associated with compact objects.
This conclusion contradicts Wang (1995) who argued, using ROSAT data, that two earlier
discovered X-ray sources are accreting black-hole binaries. Five early type stars in R136 are
not bright in X-rays, possibly indicating that they are either: single stars or have a low mass
companion or a wide orbit. The resulting binary fraction among early type stars is unusually high;
possibly all early type stars in the 30 Doradus region are binaries.