NANCHANG, Jan. 20 -- Four people were missing and 25 others were injured after blasts swept a fireworks plant in east China's Jiangxi Province early on Wednesday, said government sources.

The first blast ripped through a workshop of Hongsheng fireworks factory in Kunshan village in Guangfeng district, Shangrao city at around 0:30 a.m. Wednesday, said the city's emergency management office. Several blasts followed.

The missing people were a cook, a guard and warehouse workers. Rescuers have managed to pull out 21 people in the dormitory area of the plant. Over 1,000 people nearby were evacuated to safe areas after the blasts.

The injured have been sent to hospitals. The blaze caused by the blasts has not been put out.

The executives of the plant were held by police for investigation.

The Guangfeng area boasts a history of more than 300 years in fireworks production.