U.S. Reps. Edward Markey and Stephen Lynch, the two Democratic candidates for U.S. Senate, have agreed to participate in six debates between now and the April 30 primary, according to the Boston Herald.

The Boston Herald’s Chris Cassidy Tweeted that three of the debates will be general format, with the remaining three focusing on jobs, domestic issues and foreign policy. One of the debates will be held in Boston, and others will be held in Lowell, New Bedford, Worcester and Springfield. The location of the sixth debate has not been determined.

Markey and Lynch are vying to represent the Democratic Party in the June 25 special election to fill the seat vacated by John Kerry after he became secretary of state. Several Republicans are already in the running, and candidates have until Feb. 27 to gather the 10,000 certified signatures needed to appear on the primary ballot. Beverly Libertarian Daniel Fishman is also considering a run.

PREVIOUSLY ON SOMERVILLE PATCH:

• Lynch, Markey Hit the Road, Republicans Get Started
• Sciortino Stumps for Markey at Harvard College Democrats Endorsement Meeting
• More Republicans Enter Race for U.S. Senate
• It’s Official: Winslow is First Official Republican Candidate for U.S. Senate
• Tarr, Winslow Considering Runs for U.S. Senate
• Will the GOP Field a Candidate in U.S. Senate Race?
• Scott Brown Will Not Run for U.S. Senate
• Markey or Lynch: Who Would You Vote for Today?
• Lynch Announces U.S. Senate Run on Facebook
• Lynch Exploring Run for Senate Seat
• UPDATE: Brown Questions Markey's Malden Residency
• UPDATE: Lynch Uncertain About Senate Run
• Kerry, Kennedy Back Markey for Senate
• Who Do You Think Should Run for Kerry’s Seat?