Two men who went to investigate the sound of windows shattering at their homes in Prince George's County early yesterday were killed in separate incidents 20 minutes apart.

Police said they found nothing to link the two killings -- one a shooting in Landover Hills, the other a beating in Langley Park -- except the smashed windows.

The first victim was killed shortly after 3 a.m. as he looked out the shattered window of his apartment in the 4000 block of Warner Avenue in Landover Hills.

Charlie Lee Hicks, 54, had gone to investigate after he heard the noise. He was shot once as he stood there, police said. The officers responding found him bleeding in his hallway.

"It's a very, very unfortunate situation," police spokesman Cpl. Robert Clark said. "We don't know if he was an intended target, or if it was a breaking and entering."

Hicks was taken to Prince George's Hospital Center, where he was pronounced dead. A woman who identified herself as his wife declined to comment yesterday, saying it was too soon to talk. She was sitting outside the apartment building, being comforted by neighbors.

Police had just started their work on Warner Avenue when a 911 call for medical help sent other officers to Langley Park.

They found Jacob Adonis Paiz-Garnica of the 1400 block of Merrimac Drive. He had gone outside to see who or what had just broken one of his apartment windows and was accosted and beaten severely on the upper body with an unknown weapon, Clark said.

Paiz-Garnica was pronounced dead at Washington Hospital Center.

At the Quebec Arms apartments, where Paiz-Garnica lived, none of a dozen or so neighbors enjoying the afternoon sun said they knew the 29-year-old or anything about the killing.

Police had made no arrests by last night and said they knew of no motive in either case. They ask anyone with information that might aid in the investigations to call the homicide unit at 301-772-4925 or Crime Solvers at 301-735-1111. Cash rewards of up to $1,000 are offered for tips leading to the suspects' apprehension and indictment.

The two slayings pushed the county's homicide total this year to 87, which keeps Prince George's on pace to exceed the 128 killings recorded last year.

Staff writer Eric M. Weiss contributed to this report.