Tentative CO detections of high-velocity clouds in directions radially extending from the main nucleus to outer parts of the galaxy. The contour levels in the right panels are: 2σ, 3σ and 4σ. In the last two panels, the solid-line and the dotted spectra (middle) correspond to the emission of the solid-line and the dotted ellipses (left), respectively. The latter marks the extent of the nuclear wind which is shown in Fig. 11.