READING (AP) _ Authorities in Berks County say they have arrested a suspect in the homicide of a man stabbed to death at a backyard birthday party.

Police and officials at the Berks County coroner's office say 22-year-old Kristoffer Schildt was stabbed at about 4:30 a.m. Sunday. He was pronounced dead an hour later in the Reading Hospital emergency room.

Police Chief Erik P. Grunzig says four men arrived at the Muhlenberg Township party after 4 a.m. and were asked to leave after they began causing a disturbance. Grunzig says Schildt was stabbed once in the chest as the men were leaving.

Muhlenberg Township police say a 24-year-old Mertztown man was arrested Sunday night and will be charged with first- and third-degree murder.

Police say they believe they have recovered the knife used, but they do not know the motive for the stabbing.