Democratic Senate candidate Elizabeth Warren announced this morning that she raised $8.67 million in April, May, and June – more than she has raised in any previous quarter and $1.7 million more than she raised in the first three months of the year.

Warren is already the nation’s leading congressional fundraiser and the latest figures are likely to widen her lead.

With the latest figures, Warren has now raised more than $24.5 million. As of the last deadline, in March, she had raised just under $16 million, more than any of the 1,613 candidates officially running, according to the Center for Responsive Politics.

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The campaign said $3.1 million of its latest haul came in June, its most lucrative month to date.

Republican Scott Brown has not announced his totals yet. Candidates must file full reports by Sunday.

The Warren campaign said that 81 percent of its donations were for $50 or less. It said 40,500 of its donations came from Massachusetts residents, but did not reveal how many came from out- of-state donors, which have so far been a larger source of cash for the Harvard professor.

“Elizabeth Warren has fought hard to create a level playing field for middle class families. It is those men and women who are fueling this campaign,” Mindy Myers, Warren’s campaign manager, said in a statement.

Brown campaign spokeswoman Alleigh Marre shot back that Warren’s campaign is “largely dependent on out-of-state, extreme special interests and fellow Occupy protesters who share her radical tax, borrow and spend agenda.”

“Ultimately, however, elections are decided by the voters based on competing visions for our future, and Scott Brown will have the resources he needs to share his pro-jobs message and independent record with voters across the Commonwealth,” Marre said. “No amount of money can wash away Professor Warren’s support of job-crushing tax hikes that would devastate our economy, especially in the wake of Friday’s incredibly weak employment report.”