The victim dropped the hammer and the suspect hit him with it.
A man was accused of theft and hit over the head with his own hammer in an aggravated assault Tuesday in the mid-Market area, police said.
The 56-year-old victim was accused by another man, 51, of stealing his credit cards in the 800 block of Market Street about 9:40 p.m., police said. The victim dropped his bag and a mallet fell out.
The accuser grabbed the mallet and chased the victim, police said, before hitting the victim several times in the head with it.
The suspect fled on foot but was later arrested.