BEIJING - Chinese Premier Wen Jiabao arrived in Wenzhou of East China's Zhejiang province Thursday morning to mourn victims of a fatal train collision.

Wen will visit the injured and extend his condolence to families of the dead. He will also inspect the train crash scene.

The accident on Saturday evening caused at least 39 people dead and 192 others injured.

Design flaws in the railway signal equipment led to Saturday's fatal high-speed train collision near Wenzhou in Zhejiang province, the Shanghai railway bureau said on Thursday.

Wen on Wednesday ordered a swift and transparent probe into Saturday's crash of two high-speed trains and asked that the result be made public.

Luo Lin, head of State Administration of Work Safety, has been appointed chief of a high-level investigation group to probe into Saturday's fatal high-speed train collision in East China's Zhejiang province.