By Andrew Rafferty and John Newland, NBC News
Two children were feared dead Monday after becoming trapped underneath dirt at a residential construction site near Charlotte, N.C., on Sunday, officials said.
An initial attempt to rescue the children, who are trapped below ground, was unsuccessful, according to emergency responders.
The East Lincoln, N.C., Volunteer Fire Department said efforts had "moved into the recovery phase."
Authorities did not say how the children became trapped, but neighbors told NBC affiliate WCNC that the site was a basement ?under construction and that a wall collapsed, trapping the kids.
Charlotte firefighters, police, a structural engineer and rescuers from surrounding counties are all aiding in the effort.
WCNC reported the two children are a 6-year-old girl and a 7-year-old boy. Their father was with them and made the initial call to 911 around 6 p.m. ET
This story was originally published on Sun Apr 7, 2013 10:36 PM EDT