XI'AN - Another male passenger was confirmed dead in a coach blast that occurred on Sunday in northwest China's Shaanxi Province, bringing the death toll to four.

Blast ripped through a coach running on a street near the coach station in Pucheng County in the city of Weinan around 6:40 p.m. on Sunday.

Police found another man dead when they were cleaning the site of the blast, local authorities said on Monday morning. Police also found another slightly injured passenger, who went to the hospital on himself, bringing the number of injured passengers to 25.

A critically injured passenger has been transferred to a hospital in the provincial capital Xi'an, while the rest 24 are still being treated in Pucheng, authorities said.

Local police is yet to provide any information on the cause of the blast.