At least seven workers were killed and several more were feared trapped after a blast at a chemical factory in western India on Saturday, police said. As many as 43 workers were rescued and taken to hospitals after the explosion in the plant located on the outskirts of Dhule city in Maharashtra state.
 "Seven people have died in the blast. It is not clear what kind of explosion it was, our forensic teams are investigating whether it was a blast in the boiler unit, or a gas cylinder or chemicals explosion," area police official Raju Bhujbal said.
The powerful blast rocked nearby homes and buildings and sparked a huge fire, Bhujbal said. News channels showed footage of clouds of black smoke billowing from the factory.
"Several more workers could be trapped in the factory," Bhujbal said, adding that there were varying accounts as to how many people could possibly still be inside, ranging from 60 to 100. The death toll could rise as the condition of several of the injured was said to be serious, he added.