(CNN) - The suspect in Saturday's fatal attacks on sleeping homeless men in Manhattan's Chinatown neighborhood has been charged with four counts of murder, according to NYPD Detective Ahmed Nasser.
The ages of three of the four homeless men killed in Saturday's attacks are 45, 50, and 83.
The murder charges come after four homeless men were killed -- and a fifth seriously injured -- around Manhattan's Chinatown neighborhood overnight into Saturday.
The suspect struck their heads with a metal object, apparently while they were sleeping, New York City police said Saturday.
Investigators found a metal object -- possibly a pipe -- that they believe was used in the attacks, NYPD Deputy Chief Michael Baldassano said.