Supporters of the main opposition Bangladesh Nationalist Party (BNP) and its rightwing ally Jamaat-e-Islami stabbed a rival supporter to death in northern Jamalpur, police said.
In Chittagong, a trucker died as his vehicle overturned after picketers threw brick chips at him, they said. The third death was reported from western Jhinaidah where a local BNP leader was bombed and knifed to death by suspected rival activists.
A 14-year-old boy was killed in east central Chandpur district when opposition cadres clashed with police and Awami League workers.
At least 50 people were injured when a shuttle train derailed after suspected opposition activists uprooted rail lines in northern Lalmonirhat district.
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In Dhaka, protesters torched an office of ruling Awami League. Witnesses said the protesters also hurled a few handmade bombs and raised pro-strike slogans.
The incidents of clashes, explosions and vandalism were also reported from other parts of Bangladesh.
Yesterday, five persons were killed in violence in towns and cities despite authorities deploying thousands of extra police and paramilitary personnel countrywide to prevent any untoward incident during the strike.
On October 25, six persons have been killed and over 300 injured in clashes between BNP workers and security forces across Bangladesh as the opposition was gearing up for the three-day strike.
Earlier in the day, a mobile court in Dhaka sentenced three BNP picketers to six months in jail for carrying explosive substances.
The BNP-led 18-party opposition alliance called the strike demanding restoration of the neutral caretaker government system to oversee the country's next general election.