Fairfax County fire and police officials are investigating as possible arson five early morning fires during a three-day period in the Burke area, officials said.

There were no injuries in the fires, which have caused almost $300,000 in damage, and officials investigating the fires have not named suspects.

Early yesterday, as firefighters extinguished a blaze that caused $100,000 in damage to four town houses being built at Sunset Woods Court, they saw smoke rising from another development project less than a mile away, said fire officials.

At 1:34 a.m., firefighters responded to the second fire, a single-family house being built in the 9500 block of Yardarm Lane, where minor damage was incurred.

On Saturday, firefighters put out two fires that occurred in the early morning hours at development sites in the same area. There was $100,000 damage to a house under construction on the 9600 block of Burke Wood Way at 2:47 a.m. and, less than an hour later, $80,000 damage to two partly built town houses in the 9300 block of Peter Roy Court. In between the two Saturday fires, an electrical fire broke out at a nearby Dart Drug Store at the Rolling Valley Mall.

"All the fires that occurred appear to be suspicious in nature," said Lt. Michael Reilly.