D.C. police said Thursday evening that a 19-year-old Reston man had been found dead in an alley off a street lined with bars in Northwest Washington’s Adams Morgan neighborhood.

Police spokesman Hugh Carew identified the man as Paul Michael McGuinness Jr.

In a preliminary report, police said that the body was found about noon in an alley behind the 2400 block of 18th Street and that McGuinness was pronounced dead officially at 2:40 p.m.

Paul Michael McGuinness, who identified himself as the teenager’s father, confirmed that police notified the family Thursday afternoon that his son had been found in Adams Morgan, a nightlife destination.

In a brief telephone interview, the father would not provide details of what police had told him, and he said he was not prepared to discuss what had happened to his son. “I cannot comment right now. The police are still investigating,” he said.

Police said the younger McGuinness had been missing since about 1:30 a.m. Wednesday and was last seen near a bar in the 2400 block of 18th Street.

A missing-persons report was filed Wednesday, and relatives and friends posted messages on Twitter and Facebook seeking help in finding the 19-year-old.

Police have classified the case as a death investigation, rather than a homicide.

Clarence Williams, Alice Crites and Perry Stein contributed to this report.