Archival infrared images toward the fields of the three TeV sources. Top panel: MSX (Price et al. 2001) image of the region toward HESS J1534-571, at 8.28 μm. Middle and bottom panels: three-color Spitzer images toward HESS J1614−518 and HESS J1912+101, respectively. Red, green, and blue colors indicate 24 μm (MIPSGAL, Carey et al. 2009), 8 μm, and 3.6 μm (GLIMPSE, Churchwell et al. 2009) emission, respectively. Color scales were adjusted individually to emphasize the structures in the images. Contours denote the TeV surface brightness of the respective source. The circle at the center of HESS J1614−518 denotes the position and extension of Pismis 22 (Morales et al. 2013).