The runner-up in The Gambia's presidential election, Ousainou Darboe, has said he plans to challenge the result in which the incumbent, Adama Barrow, won with 53% of the vote.
Mr Darboe said his team was collecting evidence and would pursue the matter in court if lawyers decided there was a case.
He called on his supporters to remain calm.
Mr Darboe was one of three unsuccessful candidates who questioned the conduct of the poll, but one of them - Essa Mbaye Fall - has now congratulated Adama Barrow on his re-election.
African Union election observers said the election was conducted largely in a fair and transparent manner.