An internal poll from Michelle Wu’s mayoral campaign shows a tie between her and Acting Mayor Kim Janey, according to a source close to her campaign. Many likely voters remain undecided.

The source provided a topline look at the race as the Sept. 14 preliminary approaches. The poll surveyed 600 likely voters during the first week of June, according to the source.

Janey and Wu, an at-large city councillor, came in at 29 percent.

City Councillor At-Large Annissa Essaibi George received 12 percent while District 4 Councillor Andrea Campbell took 8 percent.

State Rep. Jon Santiago and former City Hall economic development chief John Barros received 4 percent and 3 percent, respectively.

Robert Cappucci, a retired Boston police officer who also ran for mayor in 2017, saw 1 percent.

A separate poll conducted at the end of May, reported by the Bay State Banner, showed Essaibi George in the lead. She had 22 percent. Wu took in 18 percent and Janey had 16 percent.

A poll for a new union-developer coalition, which surveyed voters between May 13 and May 16, had Janey at 22 percent and Wu at 21 percent.

An April poll of registered voters for the Dorchester Reporter/WBUR/Boston Foundation put Wu at 19 percent and Janey at 18 percent.