search.php

<?php
    if ( $wp_query->query_vars['post_type'] == 'event' ) {
        $search_query = get_search_query();
        query_posts( 's=' . $search_query . '&post_type=event&posts_per_page=' . get_option('posts_per_page') );
    }
?>

<?php while (have_posts()) : the_post(); ?>
  <?php if ( $post->post_type == 'event' ) {
        get_template_part('templates/content', 'sr-event' );
    } else {
        get_template_part('templates/content', 'list' );
    }
    ?>
<?php endwhile; ?>