Find and delete files from unix directory of multiple patterns

I need to delete files from a unix directory having patterns like 'bkp', 'backup', 'bak'. Basically I want to delete all the backup files. Files in the directory:

`
A001.txt_bkp
A001.txt
A002.csv_backup
A002.csv
A003.csv
A003_bak.csv

` I want to keep below files

`
A001.txt
A002.csv
A003.csv

`