link_to :method delete css :class issue

gistfile1.txt

<%= link_to "delete me", :confirm => "Are you sure?", :method => 'delete', :class => "btn danger" %>
<%= link_to "edit me", edit_user_path,:confirm => "Are you sure?", :class => "btn info" %>

getting rendered as

<a href="/users/1?class=btn+danger&confirm=Are+you+sure%3F&method=delete">delete me</a>
<a href="/users/1/edit" class="btn info" data-confirm="Are you sure?">edit me</a>

using twitter bootstrap, class "btn danger" is not getting applied.

help?

: rake routes doesn't show any path for delete method, tats y I'm using :method=>"delete"