Chinese Premier Wen Jiabao has assured earthquake victims in southwest China that rescuers and relief materials are on the way.

Wen Jiabao was visiting cities worst hit by the quake, including Dujiangyan, Deyang and Mianzhu city, Sichuan Province, where death toll by Monday's 7.8-magnitude earthquake has surpassed 12,000.

"Rescue teams of soldiers and armed police officers are going all out to reach the worst-hit regions and many have already started rescuing trapped people. We will try our best to send milk powder to parents and ensure children do not go hungry"

Premier Wen said the rescue work had entered a crucial stage and asked people to remain calm, confident and united. And he urged officials to ensure the rapid distribution of food.