The incident prompted Assam Chief Minister Tarun Gogoi to order a scientific probe on Monday, Sep 27.
Sources say around 30 cases have been reported and admitting more than 20 people in various hospitals during the past weeks. These victims complained of nausea, splitting headache and unconscious after the mobile handsets exploded soon after receiving a call.
At least 10 such cases were brought to the notice of the police although no cases were registered as the officials were perplexed, not knowing what to do.
One of the victims said, "I got a phone call from an unknown number and I noticed on my handset that the numbers were highlighted in red colour. Soon after I received the call, there was a loud sound and I was left unconscious."
Mobile service providers are also confused and have no scientific explanation to these cases.
"The interesting thing is that some of the handsets that have bursted are from genuine brands like Nokia, Samsung and Motorola. Initially, it was presumed the cases were witnessed in cheap Chinese make handsets, but now even that theory was proved wrong," a police official said.