* No foreigners among dead but toll expected to rise
* Tremor felt on Bali, where two confirmed dead
* Airlines add flights for tourists cutting holidays short
* Lombok rocked by 6.4 magnitude quake a week earlier
Rescuers used diggers and heavy machinery to clear debris and search for survivors on Monday after a magnitude 6.9 earthquake killed at least 98 people on Indonesia's resort island of Lombok, prompting a tourist exodus.
The island was further rattled by a magnitude 5.2 earthquake on Monday evening. Valentin Valla, a French tourist in the town of Mataram said the quake woke up tourists who ran out of their hotel, but there was no apparent damage.
The National Disaster Mitigation Agency (BNPB) said it expected the death toll to rise once the rubble of more than 13,000 houses was cleared away after two powerful quakes in a week.
Power and communications were severed in some areas, with landslides and a collapsed bridge blocking access to areas around the epicentre in the north.
The military said it would send a ship with medical aid, supplies and logistics support.
Indonesia sits on the Pacific Ring of Fire and is regularly hit by earthquakes. In 2004, the Indian Ocean tsunami killed 226,000 people in 13 countries, including more than 120,000 in Indonesia.
Officials said more than 2,000 people had been evacuated from the three Gili islands off the northwest coast of Lombok, where fears of another tsunami spread.
Michelle Thompson, an American holidaying on one of the Gilis, described a scramble to get on boats leaving for the main island during which her husband was injured.
"People were just throwing their suitcases on board and I had to struggle to get my husband on, because he was bleeding," she said.
BNPB spokesman Sutopo Purwo Nugroho said emergency units in its hospitals were overflowing and some patients were being treated in parking lots.
The main hospital in the town of Tanjung in the north was severely damaged, so staff set up about 30 beds in the shade of trees and in a tent on a field to tend to the injured.
A boy with a heavily bandaged leg wailed in pain, an elderly man wore a splint improvised from strips of cardboard on a broken arm, and some hurt by falling debris still had dried blood on their faces.
The Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG) said more than 120 aftershocks were recorded after Sunday evening's quake.
Lombok had already been hit on July 29 by a 6.4 magnitude quake that killed 17 people and briefly stranded several hundred trekkers on the slopes of a volcano.
At magnitude 6.9, Sunday's quake released more than five times the energy of the earlier one, the United States Geological Survey website said.
The tremor was powerful enough to be felt on the neighbouring island of Bali where, BNPB said, two people died.
Despite it being a popular tourist destination, no foreigners were recorded among the dead, BNPB spokesman Nugroho told a news conference. Some 236 people were injured and more than 20,000 displaced, he said.
"We have yet to ask for help from the international(community). But if there's any friendly country who wants to offer help, please do," Nugroho said.
British-based charity Oxfam said it was providing clean drinking water and tarpaulin shelter sheets to 5,000 people and planned to intensify aid delivery.
The United Nations has offered to support rescue and relief efforts if required.
The Indonesian Red Cross said on Twitter it had helped a woman give birth at a makeshift health care station after the quake. One of the names she gave the baby boy was "Gempa", which means earthquake.
Among those displaced were residents of a northern village called Mentigi, who fled to nearby hills. Blue tarpaulins dotted the landscape as people prepared to spend the nights outdoors because of aftershocks or because their homes were destroyed.
"We are getting some aid from volunteers, but we don't have proper tents yet," said a 50-year-old villager sheltering with his wife and children, who gave his name only as Marhun.
Sengiggi, a seaside tourist strip on Lombok, looked abandoned. Amid collapsed homes, most hotels seemed to have shut and beaches were deserted. The few restaurants left open were rationing food.
Long lines formed at the airport of Lombok's main town, Mataram, as foreign visitors cut their holidays short. BNPB said 18 extra flights had been added for leaving tourists.
"I was at the rooftop of my hotel and the building started swaying very hard ... I could not stand up," said Gino Poggiali, a 43-year-old Frenchman, who was with his wife and two children at the airport.
His wife Maude, 44, said the family was on Bali for the first quake and Lombok for the second.
"This is it for me in Indonesia. Next time we will stay in France, or somewhere close," she said.
Dutch tourist Marc Ganbuwalba injured his knee in a stampede of diners from a restaurant after the quake.
"We are cutting short our holiday because I can't walk and we're just not in the mood anymore," said the 26-year-old, sitting on a trolley at the airport with his leg bandaged.