Spitzer infrared colour image of the region G327.3–0.6 with red representing 8.0 μm, green 4.5 μm and blue 3.6 μm. The blue contours represent the integrated intensity of the ¹²CO(6–5) line (thin contours are 15%, 45% and 70% of the peak emission, thick contours 30%, 60% and 90% of the peak emission). The sources discussed in this paper (the IRDC, the EGO, the hot core G327.3–0.6, the SMM6 position and the Hii region G327.3–0.5) are also marked with crosses. The white and yellow boxes mark the regions mapped with APEX and Herschel, respectively.