Democrat Tim Kaine announced Tuesday another $3 million ad buy in Virginia's U.S. Senate race, bringing to $7.5 million the total he plans to spend in the final weeks of his campaign against Republican George Allen.

The announcement comes just days after Sunday's third-quarter fundraising deadline. Kaine did not announce how much his campaign brought in. He had $2.7 million on hand as of June 30.

Kaine purchased $4.5 million in television air time earlier this year, a move his campaign said reserved space in a saturated market and saved them money. The more recent buy includes advertising purchases for TV, radio and the Internet.

"The same incredible grassroots support that allowed us to make an early and strong investment in television advertisements this fall, has enabled our campaign to increase its capacity to share Gov. Kaine's message throughout the commonwealth," Kaine spokeswoman Brandi Hoffine said.

The (Norfolk) Virginian-Pilot reported Tuesday that a Super PAC set up to help Allen recently reported spending nearly $300,000 on mailers and TV ads attacking Kaine. Allen is also soliciting help from Republicans for yard signs and bumper stickers. Allen has lagged behind Kaine in fundraising.