“We have 17,000 prisoners loose in the streets out of jails that have been destroyed,” Mr. Aboul Gheit said during an interview with the NewsHour on PBS. “How can you ask me to sort of disband that emergency law while I’m in difficulty?”

The remarks about Mr. Biden reflected the complicated relationship between Mr. Mubarak’s government and the Obama administration, which had urged swift steps toward a political transition, then endorsed Mr. Mubarak’s remaining until the end of his term later this year. Since then, Mr. Biden has suggested that the United States still expects some immediate changes to be made.

On Wednesday, the White House press secretary, Robert Gibbs, responded to the Egyptian government’s claims that such changes were premature, saying, “What you see happening on the streets of Cairo is not all that surprising when you see the lack of steps that their government has taken to meet their concerns.”

That attempt to put some distance between the United States and Mr. Mubarak, though, was unlikely to impress the protesters, who say that the Obama administration, by continuing to back the president, also ignores their concerns.