More than 50 volunteers are helping mountain rescue teams in the search for April and police have details of many more who are willing to help if needed, Detective Superintendent Reg Bevan said.
"We are extremely grateful for their help in this search and their support has been vital," he added.
Detectives investigating the abduction of April Jones have until this afternoon to charge or release murder suspect Mark Bridger.
New photographs of missing five-year-old April Jones have been released by her family, as the search for her continues.
Police have been granted an additional 24 hours to question April Jones murder suspect Mark Bridger.