How can I delete all indexed docs from a specific crawler?

(from github.com/PakanAngel)
I just setup a crawler and it worked well. But as I reviewed the crawl info, realized there are some unwanted indexed files like .css and some other website links and .php files which I had to exclude in my crawler settings. Now I need to delete all indexed docs from a specific crawler and reconfigure the crawler and let it recrawl the website. How can I do this?

(from github.com/marevol)
You can delete documents from index by a query at Admin Search page.

(from github.com/PakanAngel)
Yes I think in this page I can just delete docs one by one but I am looking for a command so I can delete all docs crawled by a crawler at once.

(from github.com/marevol)
There is Delete All by Query button at the bottom of the page.

(from github.com/PakanAngel)
Oh, yes thank you.