RALEIGH — Three of seven families displaced by an apartment building fire on Christmas Day settled into their new homes in the Green Castle Townhomes on Tuesday, said Sherry Mitchell, spokeswoman for the American Red Cross. Volunteers helped move furniture into the units for those residents.

The remaining families should be relocated to new homes by Thursday, Mitchell said. The American Red Cross will help with rent and apartment deposits for the families. For now, they are staying at Comfort Suites on Capital Boulevard. Chick-fil-A was donating meals to those displaced by the fire.

Meanwhile, a Raleigh fire official on Tuesday said investigators have not yet determined what caused the apartment building at Green Castle on New Hope Church Road to go up in flames.

"With the amount of damage, the fire may have burned up the evidence,"Lt. Grant Williams with the Raleigh Fire Department said on Tuesday. Williams said the apartment complex does not have sprinklers and the smoke alarms are non-electrical.

"A lot of the older apartment buildings are only required to have battery operated smoke alarms," he said.