Delete/repair files with weird permissions/owner/group

I have the following files (output of ls -l):

?rw-------  6144 1684128777 2049835008 50331648 Jan  1  1970 image1.jpg
br-xrwSrw- 25120 1987343475 1936028517 110, 110 May 30  2032 image2.jpg
?--------- 25966  774963978 1954164340      187 Apr  8  1996 image3.jpg
br--r-xrwT  9776  892169583  859126070  80,  76 May 19  1999 image4.jpg
c--xr-xrw- 25967 1852137846 1931502624  77,  32 Nov 15  2031 image5.jpg

A normal file in the same directory looks like:

-rw-r--r--     1 apache     apache       198849 Jan 29 21:45 image6.jpg

I already tried to remove those weird files with rm -f but I got the error:

rm: cannot remove `image1.jpg': Operation not permitted

When I try to check the flags/remove immutable flag with lsattr and chattr then I get the following errors:

lsattr: Operation not supported While reading flags on image1.jpg
chattr: Operation not supported while reading flags on image1.jpg

Questions

1. What is going on here? These files seem corrupt?


2. How can I remove/fix these files?