Talks continued Saturday between federal officials and top Wall Street executives aimed at resolving the crisis swirling around Lehman Brothers Holdings Inc. and soothing jittery U.S. financial markets.

While the situation remains fluid, some sort of solution might be reached as soon as Saturday night, according to people familiar with the situation. But it isn't clear how much progress has been made toward clearing the biggest hurdle in the discussions, which is whether any government funding will be provided to help engineer a rescue for the battered investment bank.

Treasury Department and Federal Reserve officials have made it clear to participants that no government bailout should be expected. Potential bidders, worried about the risk of buying an ailing financial institution like Lehman, want the government to step in with a package similar to what was offered to J.P. Morgan when it bought Bear Stearns Cos. Then, the federal government agreed to absorb as much as $29 billion in losses.

On Saturday, the main task ahead in discussions being led by the Federal Reserve is identifying whether a so-called "bad bank" structure could be designed to hold Lehman's souring assets. That issue is now seen by people familiar with the situation as the key stumbling block to completing a deal, especially if Treasury and Fed officials keep digging in their heels on opposition to a government-backed rescue.

Potential buyers such as Bank of America Corp. and Barclays PLC are loathe to take on Lehman's bad assets, which are seen as an immovable object to getting a deal done, according to people familiar with the situation.