Marysville Police have arrested three teens they suspect were involved in a trio of fires set outside Pinewood Elementary schools over the past week. Just after 5:30 a.m. on Saturday, firefighters extinguished a small fire in a green recycling bin near the gym. On Monday, firefighters found a dumpster fire outside the school just after 2:15 a.m. There was also a smoldering fire in a portable restroom. Then on Wednesday about 4:30 a.m. there was another dumpster fire. It was in the same dumpster as the previous fire. No one was injured in any of the fires and there was no damage to school buildings. Three suspects were captured on school security cameras and led to their arrest.