TIANJIN, China — New small explosions rocked a disaster zone in the Chinese port of Tianjin on Saturday as teams scrambled to clear dangerous chemical contamination and found several more bodies to bring the death toll to 104 in massive blasts earlier in the week.

Angry relatives of missing firefighters stormed a government news conference to demand any information on their loved ones, who have not been seen since a fire and rapid succession of blasts late Wednesday at a warehouse for hazardous chemicals in a mostly industrial area.

The death toll in the ensuing inferno included at least 21 firefighters – making the disaster the deadliest for Chinese firefighters in more than six decades.

An unknown number of firefighters remain missing, and a total of 720 people were injured in the disaster in Tianjin, 75 miles east of Beijing. One additional survivor was found Saturday.