KARACHI - Death toll in the fresh wave of riots and firing incidents in various parts of the metropolis shot up on Sunday to 30 with over 200 injured. Sindh Home Department has imposed a ban on pillion-riding for three days. Heavy contingents of police and Rangers failed to maintain law and order situation as another 16 people were killed and more than 70 sustained injuries besides 50 vehicles, houses and a number of shops were set on fire Sunday by the unruly mob. The rioters set shops on fire at Timber Market and also torched push-carts in other areas of the city. "In different incidents of firing by rioters, several people have been killed and dozens of others injured," Karachi police chief Waseem Ahmed said. Prime Minister Yousuf Raza Gilani and Sindh Chief Minister while taking notice of Karachi violence have sought report within 24 hours. They have directed the law enforcement agencies to keep close eye on the miscreants. Different trade centres, markets, petrol pumps, shops and CNG stations remained closed and transport system in the city completely came to stand still. Sindh Interior department has declared red alert in the city and deployed more than 500 Rangers personnel and increased police patrolling in different parts. The entire city is in the grip of tension and fear and city administration has declared emergency in all hospitals. Police department has also cancelled vacations of its personnel in view of the law and order situation. Paramedical staff of the Qatar and Abbasi Shaheed Hospitals also wounded in the riots. Meanwhile, law enforcement agencies have arrested more than 35 miscreants from different parts of city.