A man suspected to be behind two bus explosions in Foshan's Nanais district has been detained, according to a statement released by Nanhai district bureau of public security on Thursday.

Liang, 22, who was detained in a house he rented in Pingzhou township at about 11 pm on Wednesday, has admitted that he had caused the blasts, the statement said.

The first blast occurred when a rubbish tin inside a bus exploded in Nanhai district's Fopingsan Road at 3:37 pm on Wednesday. The second explosion occurred 30 minutes later. Six people suffered minor injuries in the two blasts.

The incidents alarmed the provincial government as they took place when Guangdong is holding its two sessions of the province's People's Congress and the Chinese People's Political Consultative Conference.

Guangdong provincial department of public security immediately dispatched a special team to Nanhai to help investigate the case.

Liang, who was detained within seven hours of investigation, admitted that he had carried out the two explosions, the statement added.

The motive behind the blasts is still not clear.