Sunday's quake triggered a landslide from Mount Rinjani and hit dozens of tourists at the Tiu Kelep waterfall located in the foothills of the active volcano, said Sutopo Purwo Nugroho, Indonesia's National Disaster Mitigation Agency spokesman.
Landslides occurred at the waterfall following the quake and an aftershock of 5.2-magnitude, he said.
Only 22 of them went to the waterfall, while the six others remained at their hotel, he said, adding that all the tourists were scheduled to return to Kuala Lumpur tonight.
According to Deputy Malaysian Ambassador to Indonesia, Zamshari Shaharan, seven Malaysians were injured in the incident and now receiving treatment at a hospital in Lombok.
Tai was the spouse of China Press editor-in-chief Datuk Teoh Yang Khoon.
Sin Chew Daily Deputy Executive Editor-in-Chief Datin Tai Siew Kim was the first Malaysian identified to have been killed in the landslide following the above 5.0-magnitude quake which hit Lombok island, Indonesia, yesterday.
North Lombok Regional Secretariat and Protocol chief Mujaddid Muhas in a statement said there were 40 tourists in the area when the incident occurred.
It has been reported that effects from the natural disaster were felt in north Lombok and other areas, as well as in Bali.
"There are Malaysian tourists reported missing", he said.
Four ambulances attended the scene, as well as medical and rescue personnel to help the victims. As of Sunday afternoon, the team had rescued 19 people and recovered two bodies.
Lombok was rocked by several earthquakes last summer, killing more than 500 people and leaving over 150,000 homeless.