Unions are starting to wade into the special state Senate election, with two locals announcing the candidates they intend to back: Carpenters Local 67 said Wednesday that they are endorsing state Rep. Linda Dorcena Forry while Laborers Local 223 is endorsing state Rep. Nick Collins.

“We’ve got a much longer history of working with Linda,” said Chris Shannon, council representative for Carpenters Local 67 and the New England Regional Council of Carpenters. The local endorsed Forry when she ran for 12th Suffolk state representative in 2005, he said.

Laborers Local 223 endorsed Collins when he ran for Fourth Suffolk state representative in 2010. “He has fought every day for us and for the working people of his district,” Martin Walsh, the business manager for Local 223, said in a statement earlier this week. “There is no one in this race we’d rather support than Nick.”

Walsh is the cousin of state Rep. Marty Walsh, a Dorchester Democrat who is staying neutral in the race. Rep. Forry is the wife of Reporter publisher and editor Bill Forry.

The primary for the special election, created by the departure of former state Sen. Jack Hart (D-South Boston), is scheduled for April 30. South Boston native Maureen Dahill, a Democrat, is also running.