Firefighters were on the scene of a suspicious blaze early Monday morning in Vineland. Authorities are investigating a fire that occurred around 4:30 a.m. Monday at a one-story vacant house on the 2200 block of Megan Court near Linwood Avenue. Officials suspect the fire was deliberately set. No injuries were reported and the investigation is ongoing. Cumberland County fire officials are also investigating a series of suspicious fires during the past month, but have not reported that Monday’s incident is related.