Extract several pages from a djvu file

I have a djvu file of multiple pages. I wonder how to extract a new djvu file that consists of only a subset of multiple pages? For example, a djvu file has 10 pages, and I would like to extract a new djvu file consisting of pages 3-6 of the original djvu file. Can it be done with some commands of djvulibre, such as djvused, djvm, ...? I am using Ubuntu Linux. Consider two different cases: extract without removal of pages from the original djvu file, and extract without removal. Thanks!