India, July 11 -- Seven people sustained injuries in Noida's Sector 8 after a 30-litre bucket filled with chemicals used to prepare paint exploded following addition of a highly flammable cellulose nitrate, police said on Thursday, adding that their condition is stable.

The explosion caused a massive fireball, causing 30% to 40% burn injuries to the workers nearby, due to both the blast and chemical exposure, it added.

"On Thursday, around 3.35 pm, we received a call on the emergency helpline number that a blast took place at a paint factory in F Block. On visiting the spot, we found that a bucket used in the paint-making process had exploded, creating a large fireball. Workers in close proximity suffered burn injuries, and chemicals al...