Zimbabwe’s controversial re-election of President Robert Mugabe is bringing new pressure on South Africa to resolve the conflict, and raising military tensions with neighboring Botswana. Leaders of the G-8 and several African nations scolded South African Prime Minister Thabo Mbeki at a meeting in Japan Tuesday, saying his efforts to mediate Zimbabwe’s political crisis are not working, the Mail & Guardian of South Africa reports. With violence against the Zimbabwean opposition escalating, British Prime Minister Gordon Brown and German Chancellor Angela Merkel are pushing for harsher sanctions. However, some African leaders, including Mbeki, warned against sanctions they said could potentially destabilize Zimbabwe, resulting in civil war. At a press conference during the G-8 summit, Tanzanian president and African Union chairman Jakaya Kikwete and President Bush agreed to an additional meeting on the subject in August.