SAN FRANCISCO (CBS SF) — San Francisco Board of Supervisors President London Breed’s lead over former state Sen. Mark Leno ticked up just a tad in the San Francisco mayoral race Monday.

According to numbers released this afternoon, Breed’s lead went up by 21 votes for a 1,601 vote advantage. She now has 106,536 votes, 50.38 percent, over Leno’s 104,935 votes, 49.62 percent.

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Today’s report includes about 9,000 votes that were tallied since Sunday’s report. The Elections Department is still processing more than 17,000 ballots.

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Election officials will release another report Tuesday at 4 p.m.

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The winner of the race will serve the remainder of the late Mayor Ed Lee’s term, which runs through January 2020. Lee died unexpectedly in December.