How to collect the files with specific keyword in their file names within a directory

I have a directory with number of files. My requirement is, I have to search for the file-names(not file data) based on particular keyword and print that filename.

For example

ABC is the directory. Below it are files

 AEXP/INC/ARP.txt
 AEXP/OPC/ARP.txt
 AEXP/INC/PQW.txt

I want the files contains with the keyword INC.

Expected output:

AEXP/INC/ARP.txt
AEXP/INC/PQW.txt

I tried this logic, But it is not working properly

#!/bin/sh

for FILE in ABC/* do
    if [[ $file =~ /INC/i ]] then
        echo success;
    else
        echo fail;
    fi
done

Please help me to get the right answer. bash script, Perl, regex, anything is fine.