President Obama is headed to Boston next Wednesday to campaign and fundraise for Rep. Ed Markey (D-Mass.). The special election to fill the Senate seat vacated when John Kerry became secretary of state will be held on June 25.

The Markey campaign confirmed the president would be in Boston on Wednesday, June 12, but wouldn't comment on the fundraiser. Another Democratic source in the state confirmed the fundraiser, which will be a lunchtime event at the posh Fairmont Copley Plaza hotel.

Last week, first lady Michelle Obama headlined a fundraiser for Markey, which raised $600,000 for the longtime Massachusetts congressman.

"My husband can't do it alone," Mrs. Obama said at the fundraiser. "He absolutely needs folks like Ed Markey in the Senate to make it happen. So here in the state of Massachusetts, we need you to do everything you can over these next four weeks to get Ed Markey elected."

The Boston Herald first reported the news that Obama would hold a fundraiser for Markey.

In 2010, the president campaigned for Democrat Martha Coakley in the special election to fill the Senate seat when Sen. Ted Kennedy (D-Mass) died. Coakley lost to Republican Scott Brown.

ABC News' Arlette Saenz contributed to this report.