if these officers believe, on reasonable grounds, that the person is in the country unlawfully, they may be detained while an investigation into their status is conducted.

haeba baofisiri bana, tlasa mabaka a utlwahalang, ba kgolwa hore motho enwa o ka hara naha ka mokgwa o seng molaong, ba ka mmeha polokelong ya sepolesa nakong eo diphuputso tsa boemo ba hae di ntseng di etswa.
