Rescue crews battled a fire and rough seas Wednesday as they worked to evacuate passengers from a burning ferry near Indonesia’s tourist island of Bali.

Rescuers and nearby vessels had rescued 106 people from the ferry, while efforts were underway to evacuate the remaining 25 passengers and crew members, authorities said.

“Our top priority is the safety of all passengers and crew members,” said Muhammad Hariyadi, head of the Mataram Search and Rescue Office.

He said difficult weather conditions, including waves reaching up to 4 meters (13 feet), were hampering the rescue operation.

The fire broke out around 4:15 a.m. while the Putri Yasmin ferry was traveling from Padang Bai port in Bali to Lembar port on the neighboring island of Lombok in West Nusa Tenggara province, according to the search and rescue office in Mataram, the provincial capital.

The agency received an emergency report nearly 30 minutes later and immediately sent personnel and rescue vessels to the scene.

Hariyadi said Indonesian navy ships, patrol boats and rescue vessels were involved in the operation, while a helicopter was deployed to conduct an aerial survey.

According to passenger manifest data from the Padang Bai port authority, the ferry was carrying 114 passengers and 17 crew members. It was also transporting 44 vehicles and 53 motorcycles.

Indonesia is an archipelago of more than 17,000 islands, where ferries are widely used for transportation. Ferry accidents occur regularly in the country, with weak enforcement of safety regulations often blamed for the disasters.