sounds like flour beetles
http://www.google.co....ved=0CEIQ9QEwAw&dur=2
They live on carbohydrate generally and are usually found in kitchens. I accidentally infested my kitchen by bringing in infested wild bird food. Do people eat in your office or bring biscuits in? Once in the room they can live on very small amounts of food and are a b to get rid off. Do you have a maintenance department or any kind of health support? The same folk you would go to if you had mice?
To get rid you remove all food sources and chuck them and clean like a demon, then clean again. Any food stores need to be kept in airtight containers or preferably else where and if folk eat in the office then they have to be obsessive about not dropping crumbs...better to ban eating in the office for at least a month to starve the hatchlings which there will be.