Police are looking for a man they say pointe a gun at an officer around 11 p.m. outside the Lee K-8 School on Talbot Avenue in Dorchester. The officer shot at the man, then chased him to a fence at the cemetery behind the school, which the man jumped and escaped.

Police recovered a black jacket and a silver handgun on the school's basketball court.

Police set up a perimeter around the cemetery to let police dogs hunt for the suspect, described as black, 19 or 20 and wearing a black half mask and a black hoodie. Around midnight, however, a sweep of the cemetery ended without dogs or officers finding the suspect.

Police brought in additional units from other parts of the city to help in the search. A State Police helicopter joined in the search.

The officer was taken to the hospital for observation.