Search in VI (VIM) for a string, then delete to end of line.

I have a requirement which I am sure I can do in vi (plenty of other solutions I am sure), and this is it.

I have a file that looks like this

1234 Some Text HERE rest of line
1235 Some Other Text HERE rest of line

What I want to do is delete text from, and including the word HERE to the end of the line, leaving me with this;

1234 Some Text
1235 Some Other Text

I have done search and replace things in vi, but am not sure how to do a search then run a command.

Any help, as always is greatly appreciated.

Thanks in anticipation

(This has been posted elsewhere, so sorry for duplication)

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