Supporters of gay marriage in Washington state say they raised more than $950,000 last month for the campaign to uphold the state's new law, which is currently on hold pending the outcome of a November ballot measure.

Monday's announcement by Washington United for Marriage comes a day before the deadline for initiative campaigns to file their monthly campaign finance reports with the state Public Disclosure Commission.

Referendum 74 was certified for the ballot last month after gay marriage opponents turned in more than 240,000 signatures, far more than the minimum of 120,577 valid voter signatures required.

The referendum seeks to overturn the law passed earlier this year allowing same-sex marriage in the state.

Phone and email messages left with Preserve Marriage Washington, the group behind the referendum seeking to overturn the law, were not immediately returned Monday.