Former state Sen. Mark Leno talks with reporters while conceding the race for San Francisco mayor Wednesday, June 13, 2018, in San Francisco. Leno said that he called chief rival London Breed with his congratulations in her new job as mayor. He said Breed was a "remarkable young woman" who will do a fine job as mayor. (AP Photo/Lorin Eleni Gill)

SAN FRANCISCO - The Latest on San Francisco's mayor's race (all times local):

5:14 p.m.

The latest election update by San Francisco officials sealed London Breed's victory in the mayor's race.

She led former state Sen. Mark Leno by nearly 2,200 votes out of nearly 250,000 ballots cast. Elections officials say about 7,000 ballots remaining to be tallied.

Breed's narrow lead has been increasing since Saturday and Leno conceded the race Wednesday, saying the math did not favour his campaign.

He called Breed to congratulate her on her victory.

Breed appeared briefly before reporters and cheering supporters at City Hall on Wednesday afternoon to say she was humbled and honoured to be the city's next mayor.

She is the second woman and the first African-American woman elected mayor of San Francisco.

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3:45 p.m.

An exuberant London Breed appeared on the steps of City Hall on Wednesday saying she was humbled and looking forward to serving as San Francisco's next mayor.

Breed, who is a supervisor, thanked former state Sen. Mark Leno for calling earlier in the day to offer his congratulations on her victory.

Breed was ahead by fewer than 1,900 votes Tuesday with 145,000 ballots counted.

Analysts expect her to maintain the lead with another vote update expected at 4 p.m.

Breed would be the first African-American woman elected mayor of San Francisco. The president of the Board of Supervisors had the backing of the business and political establishment base.

An official winner will not be declared until election results are certified.

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1:15 p.m.

Former state Sen. Mark Leno conceded the race for San Francisco mayor Wednesday, saying that he called chief rival London Breed with his congratulations in her new job as mayor.

He said Breed was a "remarkable young woman" who will do a fine job as mayor.

Breed was leading Leno a week after the June 5 election by fewer than 1,900 votes with about 245,000 ballots tallied and at least 9,000 ballots left to count.

Breed would be the first African-American woman elected mayor of San Francisco. The president of the Board of Supervisors had the backing of the business and political establishment base.

Breed has 50.42 per cent of the vote, including nearly 37 per cent of first-place votes.

San Francisco uses a ranked-choice voting system where voters can pick three candidates in order.

Breed is expected to make a statement Wednesday afternoon.

Updated results are expected at 4 p.m. Wednesday

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10:05 a.m.

San Francisco mayoral candidate and former state Sen. Mark Leno is scheduled to make remarks about the election as the latest results show London Breed pulling ahead in a tight race.

Leno's campaign declined to elaborate on the Wednesday 1 p.m. event.

Breed is leading Leno a week after the June 5 election by fewer than 1,900 votes with about 245,000 ballots tallied. There are at least 9,000 ballots left to count.

Analysts say it would be extremely difficult for Leno to win based on voting trends and the number of ballots left to count.

Breed has 50.42 per cent of the vote, including nearly 37 per cent of first-place votes.

San Francisco uses a ranked-choice voting system where voters can pick three candidates in order.

Breed's campaign had no comment.

News from © The Associated Press, 2018