A bus catches fire in Guangzhou, capital of South China's Guangdong province, July 15, 2014.[Photo/Xinhua]

Police has detained a suspect who was involved into the blast of a public bus in Guangzhou's Haizhu district on Tuesday night, police sources said on Wednesday.

The suspect surnamed Ou who comes from Central China's Hunan province has admitted to arson the No 301 bus after he was detained.

Ou, 25, was detained in Guangzhou's Baiyun district at 11:47 am Wednesday, police said. But why Ou had carried out the arson attack to thepublic bus is still being further investigated, police said. The blast took place at about 7:40 pm Tuesday has left two dead and 33 injured. The wounded were immediately sent to three nearby hospitals for treatment.

The case has raised great concerns from both Guangdong provincial and Guangzhou city government.

Guangdong Party chief Hu Chunhua and governor Zhu Xiaodan have urged to investigate the case to its fullest extent and make the finding become public.

Chen Jianhua, mayor of Guangzhou, arrived in the hospitals to visit to victims and urged doctors to do what they can to help rescue the wounded.