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The Fermi-LAT has detected more than 3000 sources in the GeV $\gamma$-rayregime. The majority are extra-galactic and these sources are dominated byblazars. However, $\sim28$ per cent of the sources in Fermi 3LAC are listed asblazar candidates of uncertain type (BCU). Increasing the number of classifiedFermi-LAT sources is important for improving our understanding ofextra-galactic $\gamma$-ray sources and can be used to search for new very highenergy sources. We report on the optical spectroscopy of seven selectedunclassified BCU sources during 2014 and 2015 undertaken using the SAAO 1.9-mand Southern African Large Telescope (SALT). Based on the identified spectrallines we have classified three of the sources as FSRQs and the remaining fouras BL Lac objects, determining the redshift for four sources.

Optical spectroscopic classification of a selection of Southern Hemisphere Fermi-LAT unclassified blazars