How to display a specific category of posts

Hi all,

I am attempting to build a website for the first time – it is almost there but I need a helping hand on a few small issues please.

I am trying to get the following to JUST display the latest REPORTS – not all the latest posts.

Thanks in advance,

Andy

<div class="container" id="recent-posts">
	<div class="four columns leftbox">
		<h2>reports</h2>
		<p>These are the latest reports</p>
	</div>

	 	 <?php 	$query = new WP_Query( array( 'posts_per_page' =>'3' ) );
	           	if ($query->have_posts()) : while ($query->have_posts()) : $query->the_post();	?>

	<div class="four columns rightbox">
			<?php $image_attr = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'index_wide'); ?>
			<a href="<?php the_permalink() ?>">	<img src="<?php echo $image_attr[0]; ?>" class="index-wideimg scale-with-grid"></a>

			<div class="panelpost">
			<h2><a href="<?php the_permalink() ?>"> <?php the_title(); ?> </a></h2>
			<span class="paneldate"><?php the_time('l, n F Y'); ?></span>
			</div>
	</div>

		<?php endwhile; endif; ?>
</div>