Models engaged or supporting in close combat may not fire weapons in the Shooting phase. Their attentions are completely engaged by the swirling melee. Likewise, while especially twisted and soulless commanders may wish their warriors to fire indiscriminately into close combats in the hopes of hitting the enemy, this is not permitted. The events in a close combat move too quickly and the warriors themselves will be understandably hesitant about firing on their comrades (they may end up in the same straits soon enough after all).
Models belonging to locked units that are not engaged in combat themselves or are not supporting engaged friends, may shoot in their own Shooting phase and may be shot at in the enemy Shooting phase. Note, however, that lines of fire may not be traced through the Danger Zone due to the risk of hitting the combatants, and that all the models in the locked unit count as moving for the purposes of firing heavy and rapid-fire weapons. Blast markers can be re-positioned subject to the normal rules, so it is probably not a good idea to fire a plasma cannon at the back of a close combat if you value the combatants much. Templates and Ordnance Blast markers may only be positioned so they target models outside the Danger Zone.
Morale checks and Pinning tests inflicted by shooting are ignored by units which are locked in close combat.
Diagram 12. Shooting Into Close Combat: Models more than 2" from the combat's line of sight may shoot and be shot at as normal. Models within 2" of the combat line of sight may not shoot or be shot at, since the combat blocks line of sight.