I am trying to implement clean urls using .htaccess.

Basically after searching for some time I found out this code

RewriteRule latestnews/([a-zA-Z0-9]+)/$ http://thinkmovie.in/index.php/latestnews/?nid=$1 [L]
RewriteRule latestnews/([a-zA-Z0-9]+)$ http://thinkmovie.in/index.php/latestnews/?nid=$1 [L]

so when I try to access the following url

http://thinkmovie.in/index.php/latestnews/272

it redirects to

http://thinkmovie.in/index.php/latestnews?nid=272

But what I want is to retain the url in the browsers address bar as

 http://thinkmovie.in/index.php/latestnews/272