Roaches these are common in many cities most common type would be German roaches. German Roaches breed extremely fast band can build up to a major problem fast .They prefer kitchens and bathroom areas but will spread to the entire house quickly they are more active at night and if your seeing them out in the day time there most likely is a larger infestation .If your problem just started your just seeing a few scatter once in while .Get some victor roach pheromone traps these work great just put them out they fill up roaches get trapped just throw them out when they fill up and put a new ones out you can get these online at a pest control supply site .At the same time Make sure to buy roach bait the bait that comes in the syringe type applicator is far better than the ones you set out on counter tops apply bait in cracks in the inside corners of your kitchen cabinets in the bathroom under the sink around door jams small dots are all you need re apply every month it takes a while but baiting is very effective in the long run the pheromone traps will get rid of them fast while the baits working  If you have a major infestation you need a pro to do at least a clean out with a fogger and have them spray a IGR with is insect growth regulator then you can implement your own baiting but for really bad infestations call a pro let them get it under control then you can do baiting to prevent the problem from returning
DO NOT USE SPRAYS OR ROACH POWDER AROUND ANY BAITING AREAS  IT MAKES the BAITING  TOTALLY WORTHLESS ROACHES WILL NOT EAT BAIT SPRAYED WITH PESTICIDES OR BORIC ACID