France, June 25 -- Around 20 groups - including the March and March movement and Operation Dudula - on Thursday held a press conference calling on South Africans to join what they described as a "Great Liberation March".

The groups are demanding tougher government action on undocumented migration, including tighter border controls and deportations.

The call comes after weeks of protests demanding that undocumented foreigners leave South Africa by 30 June.

The coalition has sought to distance itself from violent incidents linked to protests against undocumented migrants, after three African nationals - two Mozambicans and one Malawian - were killed this year.

Musa KaHlongwa, head of United South Africans, one of the civic groups in the...