Investigators now say the fires that damaged two construction trailers at Silver Sands State Park in Milford on Sunday were intentionally set and a reward is being offered for information, according to the Connecticut Department of Energy and Environmental Protection. The call came in at approximately 7:20 a.m., police said. Firefighters found two 40-foot trailers burning when they arrived, according to fire officials. Investigators said they found evidence of vandalism at the scene and believe the fires were intentionally set. The trailers housed equipment for the construction at the park, according to Milford Police. "The construction company does own those storage containers, but we aren't confirming right now whether it's tied to that investigation.