Exclude All Posts of a Category from News Sitemap

add_filter( 'aioseo_sitemap_exclude_posts', 'aioseo_sitemap_filter_excluded_posts', 10, 2 );

function aioseo_sitemap_filter_excluded_posts( $ids, $type ) {

    if ( 'news' === $type ) {

        $category_id = 136; 

        $posts_in_category = get_posts(array(

            'category' => $category_id,

            'numberposts' => -1,

            'fields' => 'ids'

        ));

        $ids = array_merge($ids, $posts_in_category);

    }

    return $ids;

}