The presidents of Zambia and South Africa Cyril Ramaphosa and Edgar Lungu respectively – have held talks about the situation in the Democratic Republic Congo.
Their meeting came amid growing concern that unrest could erupt in DR Congo, following tightly contested presidential elections on 30 December.
The electoral commission has been under pressure from the opposition and local observer groups to release the much-awaited results.
The South African government has tweeted a photo of Mr. Ramaphosa’s meeting with President Lungu.
South Africa is a key ally of Mr Kabila, while Zambia hosts more than 60,000 refugees who have fled conflict in DR Congo.
And opposition presidential candidate Martin Fayulu has warned election officials in the Democratic Republic of Congo not to “disguise the truth” as tensions mount over the delayed result.
Mr Fayulu said the “Congolese people already know” the result of the vote, which took place on 30 December.
A local observer group said it had witnessed “major” irregularities at counting stations.
President Joseph Kabila is due to step down after 18 years in office.
The election outcome was initially expected to be announced on Sunday.
Anti-riot police have been deployed in the capital, Kinshasa, and access to the offices of the election commission has been blocked, reports the BBC’s Louise Dewast from the city.