U.S. Congressman Michael Capuano was telling individuals at the Greater Boston Labor Council's Monday breakfast that he plans to pull nominations papers in the race to take U.S. Sen. Edward Kennedy's vacant seat.

Capuano said he would pull papers on Tuesday.

State Attorney General Martha Coakley announced her candidacy last week. U.S. Congressman Stephen Lynch, who shares Dorchester with Capuano, pulled papers last week but has yet to formally announce his candidacy.

U.S. Congressman Edward Markey said at the breakfast that he will not consider a run unless Joe Kennedy, a former congressman and Sen. Kennedy's nephew, does not run for the seat.

All are Democrats. Several Republicans reportedly weighing a run include state Sen. Scott Brown (R-Wrentham) and former U.S. Attorney Michael Sullivan.

A primary is scheduled for Dec. 8, with the special election set for Jan. 19.

UPDATE: Boston.com is reporting that Joe Kennedy says he won't run.