Rescuers in Nepal searched on Saturday for 51 passengers and crew who went missing after a landslide swept their buses into a rain-swollen river, an official said. The chances of finding survivors are decreasing. About 500 rescuers resumed their efforts in Chitwan district, about 86 km west of Kathmandu on Saturday, after the incident happened on Friday.

According to the deputy chief administrator of the district, Khimananda Bhusal, so far, the search team was only able to recover a curtain from one of the windows of the bus and a pair of trousers. Seven Indians were among the missing, and three other passengers escaped with minor injuries after jumping off the buses before the landslide fell.

Bhusal told Reuters over the phone that the survivability factor was low as more than 30 hours have passed since the buses were swept away. Yes, the water level has receded, but it is still very opaque. Rescuers have often struggled to locate bodies in previous disasters.

At least 91 people have died in landslides and floods across Nepal since mid-June due to heavy monsoon rains. Social media pictures showed rescue boats on the churning Trishuli River on Friday. The government reacted to the incident by announcing a measure for barring the buses from traveling at night through areas lacking adequate facilities on weather forecasting.