Leaders from Southern Africa began emergency talks in Swaziland on Monday.
Lead mediator and South African President Thabo Mbeki, however, insisted Tuesday that the talks were going well.
Ongoing violence may impede a runoff between President Robert Mugabe and the opposition's Morgan Tsangirai.
Leaders of the southern African region met in Zambia this weekend for an emergency summit on Zimbabwe's increasingly tense electoral impasse.
President Robert Mugabe and his top advisers will hold a Politburo meeting on Friday to decide what to do next.
Zimbabwe's main opposition leader and President Mugabe's government deny behind-the-scenes talks about a power-sharing deal in the wake of Saturday's elections.
President Robert Mugabe's government warns that premature victory claims would be seen as a 'coup.'
Zimbabweans head to the polls Saturday amid suspicion that President Robert Mugabe may rig the election to award himself yet another term.