A small boy trapped in a well in northern Moroccan for four days has died before rescuers were able to reach him.

Footage posted on social media showed the scene after his body was recovered, with hundreds of distraught rescue workers and onlookers gathered at the site chanting to god and shining the flashlights of their phones into the air.

Rayan Awram, aged five, fell into the well at his village of Ighran in the hills near Chefchaouen on Tuesday, triggering a huge rescue effort that engrossed the country.

Rescuers finally reached him late on Saturday after removing much of the adjacent hillside and delicately tunnelling a horizontal passage into the well.

King Mohammed sent condolences to his parents, a statement carried by state media reported.

The well was only 45 centimetres wide at the top and tapered as it dropped 32 metres to the bottom, where Rayan was trapped, making it impossible for rescuers to descend directly.

A male relative of the boy said on Friday the family had first realised he was missing when they heard muffled crying and lowered a phone with its light and camera switched on to locate him.

Round-the-clock desperation

“He was crying ‘lift me up’,” the relative said.

The hilly region around Chefchaouen is bitterly cold in winter and rescuers attempted to keep the boy alive by lowering food, water and oxygen through a tube.

Rescuers worked round the clock cutting a massive trench through the hillside, then tunnelling horizontally towards Rayan, with a constant risk of triggering landslides.

In the final hours of the rescue effort, workers had to move with extreme caution as they attempted to dig through earth and rocks to where Rayan lay.

They were eventually able to access the well late on Saturday, and carried his body to a waiting ambulance.

Crowds had gathered in a vigil at the scene to watch the rescue effort as hundreds of workers toiled to save the child. Across the country, Moroccans followed the saga on television in homes and cafes.

“I am so sad to learn Rayan has died. Sincere condolences to the parents,” said Abderrahim Sabihi, a Rabat resident who was following the rescue effort from a cafe.

-with AAP