Police on Friday arrested three persons including two history-sheeters in connection with murder of a car mechanic Syed Sharfuddin. The car mechanic was chased and stabbed to death by three persons. history-sheeter Syed Arshad Bhaktiyar alias Arshad and Syed Firdous, another a history-sheeter. The third person was identified as Shaik Azharuddin. On January 31, the three accused armed with knives and iron rods came to the workshop and attacked Sharfuddin. He sustained grievous injuries and died while being shifted to hospital.