How to show related posts by category or custom post type?

 <?php

$related = get_posts( array( 'category__in' => wp_get_post_categories($post->ID), 'numberposts' => 5,'post_type' => 'news', 'post__not_in' => array($post->ID) ) );
if( $related ) foreach( $related as $post ) {
setup_postdata($post); ?>
        <li>
        <?php  the_post_thumbnail(); ?>
        <a href="https://wordpress.stackexchange.com/questions/151897/<?php the_permalink() ?>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></a>

        </li>

<?php }
wp_reset_postdata(); ?>