Do monster close and area attacks affect allies by default?

Question

Recently I've been seeing several NPC monster entries with blast range attacks that have no stated target included, whereas player abilities often specifically say what they hit. For example:

Storm Pulse (standard, recharge ) Lightning Close blast 5; +15 vs Reflex; 2d4+8 lightning damage, and the target is weakened (save ends).

Is from a npc sheet, while player abilities often say their targets within the blast ("All creatures, all enemies, one creature, etc.")

I'm a bit unsure how to handle this. When an attack doesn't specify what targets within its range to attack like the one above, what should I default to for the target range?

If you want the specific sheet I'm looking at: http://www.wizards.com/dndinsider/compendium/display.aspx?page=monster&id=3338 (DDI membership needed)

Answer 1

Monster Manual 2 (p 7) has the answer for you:

An area attack or a close attack targets each creature within its area of effect, unless otherwise noted.

This gives you your answer. Unless the power specifies "enemies," area and close attacks affect all creatures.