Police have made a third arrest for attempted murder following a racially-aggravated hit-and-run attack on an NHS worker as he walked home from work in Bristol.The 21-year-old suffered a broken leg, nose and cheekbone in the attack and will require plastic surgery to his face and leg.The musician, who wishes only to be referred to by his stage name Kdogg, was walking to a bus stop after finishing work at Southmead Hospital in Bristol at about 4.30pm on July 22.He was listening to music on his