Harare - Riot police in Harare monitored an anti-xenophobia protest by civil society activists and Zimbabweans on Friday at the South African embassy, a non-governmental organisation official said."The police came in their numbers but when they discovered that the South African embassy was entertaining us then they couldn't stop the demonstration," said Sithabile Dewa, a programme manager for the Heal Zimbabwe Trust."We managed to hand over a petition to the deputy ambassador of South Africa who promised to convey the message to President [Jacob] Zuma that Zimbabweans are not happy with the way Africans and Zimbabweans in South Africa are treated," she told News24.Demonstrators held up posters, one of which read: "Africa is for Africans. Why kill a brother?"There were unconfirmed reports that Zimbabwe police may have clashed with youths mounting a similar protest elsewhere in the capital. The protest appeared to be about xenophobia and the ongoing mystery over Zimbabwe activist Itai Dzamara's whereabouts, said Dewa. Dzamara, a pro-democracy activist was abducted more than a month ago.Youths from President Robert Mugabe's ruling Zanu-PF party have meanwhile been told that they may hold an anti-xenophobia protest on Tuesday. Police warned, however, they must stay in Harare's central Africa Unity Square and that they may not march through the streets, official documents show.Zanu-PF said in a statement that it was "alarmed by the xenophobic violence perpetrated on foreign nationals including hundreds of Zimbabweans living in South Africa".The authorities are on Sunday to begin evacuating over 1 000 Zimbabweans from South Africa following claims that at least two - a woman and a child - were killed in the violence.