The war, now in its seventh month, has killed more than 34,000 Palestinians, according to Gaza health authorities
The victims were staying in Daman, a hill resort south of Kathmandu which is known for its panoramic views of the Himalayas.
“They had lit a gas heater to keep the room warm and probably suffocated,” police official Hobindra Bogati told Reuters. Seven other tourists in the group were unharmed.
Tourism is a major source of revenue for Nepal’s economy, providing hundreds of thousands of jobs. Last year just over 1 million tourists visited the country, of which the biggest contingent - around a tenth - came from India.