Arizona Sen. John McCain says civil rights advocates applauding his work on immigration reform won't be happy with the results.

McCain told a town hall meeting in northern Phoenix Monday that he and other lawmakers working on immigration legislation haven't been able to agree on key details and it's unclear when a compromise might be brokered.

McCain says the "Gang of Eight" - four Republican and four Democratic senators - has agreed on more work visas for workers and protections for illegal immigrants brought to the country as children. He declined to provide details.

The more than 150 people at the meeting included both proponents and critics of reform. McCain called for civility when the debate occasionally turned into a shouting match.

McCain and fellow Republican Arizona Sen. Jeff Flake are members of the "Gang of Eight."

President Barack Obama renewed Monday his call on Congress to pass immigration reform.