"bengal"

Stones were hurled at BJP national president J P Nadda's convoy during his visit to Diamond Harbour area in South 24 Parganas on December 10.

In Kolkata, CPI(M) activists along with SFI and DYFI members blocked roads in Lake Town, College Street, Jadavpur and Shyambazar Five-Point Crossing.

Bandh enforcers also blocked roads in Coochbehar and Jhargram districts, burning tyres and breaking the windscreen of buses.

Preliminary investigation has found that a technical fault in a heavy machine inside the factory caused the high- intensity blast.