India, April 2 -- A forensic investigation has detected the presence of aluminium powder and yellow dextrin powder, two of the ingredients to make firecrackers, at the warehouse near Deesa town in Gujarat where a massive fire broke out on April 1 and killed 21 people, police said on Wednesday.

Banaskantha superintendent of police (SP) Akshayraj Makwana said the Forensic Science Laboratory (FSL) has confirmed the presence of these substances at the site where firecrackers were stored.

Warehouse owners Khubchand Mohnani and his son Deepak Mohnani have been arrested from neighboring Sabarkantha district when they were attempting to flee to Madhya Pradesh, Makwana said.

The SP said a first information report (FIR) filed against the owners ...