"There are many international teams here they come with a large amount of heavy equipment to cut concrete and debris," he was quoted by Xinhua news as saying.
The government officials put the death toll from the earthquakes at 715; the United Nations officials said as many as 4,000 people could be buried under the rubble.
Earlier U.N. figures that put the death toll at 1,100 were just estimates, said El-Mostafa Benlamlih, a U.N. humanitarian coordinator, according to CNN.
The 7.6-magnitude quake struck close to the provincial capital of Padang, West Sumatra province of Indonesia on 30 September. A second earthquake 6.8 struck close to the same area on Oct. 1.
The rescue efforts remain the highest priority as time passes by. The rescue team leader Chang said: "The team would struggle to evacuate the survivors in the first 100 hours, as it is considered as a critical time, then the team would continue to conduct evacuation up to 7 to 10 days."
Two Australian planes carrying medical personnel and rescue experts have arrived in Padang, with dozens of British firefighters due to join a 16-man deployment late on Saturday.
A Swiss sniffer-dog team is already on the ground, and Russian, Estonian and Japanese personnel have all been sent, according to BBC news.
The Red Cross said it planned to hold a meeting in the city on Saturday to co-ordinate relief efforts.
The priority is to ensure injured survivors receive the medical attention they needed, Red Cross officials say.
Dozens of international Christian relief agencies including World Vision, Christian Aid, Church World Service, Caritas Internationalis and others are also working side by side with their local partners in the rescue efforts.
Millions of dollars in aid and financial assistance came from Australia, Britain, China, Denmark, the European Union, Germany, Japan, Malaysia, the Netherlands, Singapore, South Korea, Switzerland and the United States, Indonesian officials told Associated Press.
Wednesday's quake originated on the same fault line that spawned the 2004 Asian tsunami that killed 230,000 people in a dozen nations.