Waterville police officer Tim Hinton searches behind an apartment building on Union Street in Waterville for a man who reportedly assaulted another man with a hammer on Thursday.

Waterville Police Chief Joe Massey, left, and officer Damon Lefferts speak with a woman reportedly a friend of the man who was assaulted with a hammer and injured at an apartment on Union Street in Waterville on Thursday.

Police converge at an apartment building on Union Street in Waterville Thursday morning following a report of an assault involving a hammer.

A Waterville firefighter treats a man who was attacked in an apartment on Union Street Thursday morning, with Waterville police officer Matt Libby at right. Police were still looking for the attacker, who was reportedly armed with a gun and a hammer.

Waterville police, including Chief Joe Massey, center, converged on Union Street, where a man reportedly assaulted another man with a hammer on Thursday.

Karen Fogg, who lives in this apartment building on Union Street in Waterville, speaks about residents living there where police were searching for a man who assaulted another man with a hammer on Thursday.