WASHINGTON, June 9 (Xinhua) -- A bipartisan group of U.S. lawmakers is preparing a new infrastructure proposal without any tax hikes to engage with the Biden administration, according to local media.

The group of senators, which includes at least five Democrats and a handful more Republicans, has decided against using corporate or individual income tax increases to pay for spending on infrastructure projects, Bloomberg News reported on Wednesday, citing a senator involved in the talks.

"There are no tax increases. That is a red line for us," Mitt Romney, Republican senator from Utah, who's taken a leading role in crafting the proposal, was quoted as saying.

Romney noted that key to determining whether the bipartisan group can produce an offer to the Biden administration this week would be whether "there is sufficient support from other Republican senators for our proposal or not."

The move came after U.S. President Joe Biden on Tuesday ended infrastructure talks with a group of Senate Republicans led by Senator Shelley Moore Capito after weeks of intense negotiations.