Rescue teams are battling to save a stranded Brazilian tourist who fell into a volcano in Indonesia.

Juliana Marins, 26, was trekking up Mount Rinjani, the second highest volcano in the country, when she reportedly slipped and fell from the hiking trail early morning on June 21.

The young woman, who works as a publicist and pole dancer, screamed as she slipped on the treacherous terrain and plunged off the edge overlooking the volcano's famous crater lake. She was said to have rolled 300 metres down the slope before coming to a stop in a rocky ravine.

Juliana, from Rio de Janeiro, was spotted by passing tourists after they heard her screams for help. She was lying on the ground, alive but unable to climb back up the treacherous slopes.

Officers were today, June 23, still battling to reach her and pull her to safety.

AKP Nikolas Osman, spokesman for the East Lombok Police, said: 'While heading to the summit of Rinjani on the way to the Cemara Tunggal area, the victim experienced fatigue and the guide at that time advised her to rest. Then the five guests in the tour group were taken by the guide to continue the journey.

'However, by the time he returned to fetch her, the Brazilian woman was already missing.'

A rescue team was dispatched to the scene after receiving an emergency call at 2:32 pm local time.

Yarman, head of the Mount Rinjani National Park Office, said: 'The team has descended 300 metres but we have not reached the victim. We tried to call out to her but there was no response.'

Rescue efforts continued into Sunday morning, June 22, amid cold and extremely foggy conditions.

Yarman continued: 'At 10:00 WITA, visual information from the drone showed that the victim was no longer at the previous point.'

Officials said the search was continuing today, Monday, but Juliana remains missing as of press time.

More drones were deployed to aid in the search as dozens of rescuers rappelled down the volcano to cover ground towards Lake Segara Anak.

Juliana's sister, Mariana Marins, denounced as fake news reports that her sibling had been safely rescued.

She said: 'We received, with great concern and apprehension, information that the rescue team took food, water and warm clothing to Juliana. This is not true. The information we have is that so far they have not been able to reach her, because the rescue ropes were not long enough, in addition to the low visibility.

'All the videos that were made are lies, including the one of the rescue arriving at her. The video was forged to look like that, along with this message associated with it.

'We even celebrated. It was a shock to find out that it was a lie.'

The Brazilian Foreign Ministry said in a statement that the Brazilian embassy in Jakarta has sent representatives to monitor the rescue.

It said: 'The ambassador has personally contacted the International Director of the Search and Rescue Agency and the Director of the Indonesian National Disaster Agency, and has received reports from the local authorities on the progress of the work.'

Juliana had been on a solo trip across Asia since February. Before the incident, she had previously visited Thailand, Vietnam, and the Philippines, documenting her journey on her social media.

Mount Rinjani is an active volcano located on the island of Lombok in Indonesia, standing at 3,700 metres (12,200 feet) and is the second highest volcano in the country. It is known for its stunning crater lake, Segara Anak, and is a popular destination for hikers and adventure seekers.