DHAKA (AFP) - Dozens of people including a senior opposition figure were injured during violent protests in Bangladesh on Wednesday as an anti-government strike shut down the country for the second time in four days. Joynal Abedin Faruk, chief whip of the Bangladesh Nationalist Party (BNP), sustained serious head injuries during clashes with police and was admitted to the intensive care unit of a Dhaka hospital, medical staff said. Footage on the Bangla Vision TV channel showed a heavily bleeding Faruk being chased by baton-wielding riot police. City police chief Harunur Rashid said he had tried to vandalise a bus. "Faruk was beaten by police with batons mercilessly as he was leading a peaceful protest of BNP parliamentarians," party spokesman Rizvi Ahmed said. "Police arrested scores of our activists and used batons to disperse lawful protests," he added. Police also clashed with protesters in other cities after the BNP and its Islamist allies enforced the strike to protest against changes in the electoral system that they say unfairly favour the government.