The search for the missing five-year-old April Jones enters the fifth day as experts and officials are going all out to trace the girl.

The search operation continued through the night across Machynlleth town in mid-Wales despite heavy rain.

Mountains and forests near the town are being scoured as mountain rescue teams and special police officials have plunged into action.

"The police have given us an area to search that may be of interest to them and we're just doing what we can. We're all volunteers, so some people are doing their jobs during the day then coming here at night or they've taken time off work," Lance Paget, search manager for Longtown Mountain Search and Rescue Association, told Sky News.

Search crews have been donning pink ribbons after a request from Jones' mother. Cars and houses have been decorated with ribbons of Jones' favourite colour.

An ambulance has also been in place to provide immediate medical assistance to the girl if found.

The warrant of the suspect Mark Bridger expires at 17:00 on 5 October, but it can be extended if police officials apply for an extension.

More than 2,500 calls from the public have been received by the police authorities in response to the appeal.

"All these calls need to be answered and that's being done by all 44 police forces around the country. I'm sure you can imagine the operation that's going on in and around our force area to process that information and make sure that everything is being given the right priority," Supt Ian John told a press conference.

John appreciated the efforts of the local volunteers involved in the search operation. The volunteers are searching for the girl despite a request from the police not to do so.

Prime Minister David Cameron has also urged anyone with relevant information to help find the girl.

Local volunteers gather outside the Machynlleth Leisure Centre, to help search for missing schoolgirl April Jones, in Machynlleth, Mid WalesReuters
Police officers search a garden as they look for missing schoolgirl April Jones in Esgairgeiliog, Mid WalesReuters
Pink ribbons and a poster giving details of missing schoolgirl April Jones, are tied to railings in Machynlleth Mid WalesReuters
A pink ribbon is tied to a letterbox near the home of missing schoolgirl April Jones in Machynlleth, Mid WalesReuters
A sign is tied to the railings of a chapel near the home of missing schoolgirl April Jones in Machynlleth, Mid WalesReuters
Volunteers search for missing schoolgirl April Jones, near Aberangell, Mid WalesReuters
Police officers search for missing schoolgirl April Jones in Esgairgeiliog, Mid WalesReuters