Investigators say they cannot determine the cause of an East Lawrence house fire that killed five people earlier this month; there were no indications of criminal activity.

Fire officials plan a 4 p.m. press conference to discuss the results of the investigation that killed Charles Glover Sr., 66, and four of his grandchildren. But they sent out an early afternoon press release announcing their findings.

“Results of the investigation, at this time, do not indicate any criminal activity, however the fire will be classified as undetermined,” said the announcement from City Hall.

“Two possible factors cannot be eliminated: electrical and a human factor, whether accidental or malicious. Nearly one-third of all fires in the United States are listed as undetermined. One factor in that statistic is the level of difficulty that is nearly always present in a fire investigation. The heavy damage to the structure, as well as the absence of witnesses, contributed to the inability to identify electrical or human factor as the cause.”

Glover Sr. died Sept. 17 in a house fire in East Lawrence along with grandchildren Nolan Vender, 13; DaVonte Brockman, 11; Mario Johnson, 2; and Mariyana Johnson, 13 months.

The sole survivor of the fire was Glover’s wife, Learlean.