The investigation into a possible suicide Wednesday night at the Conowingo Dam centers around a 56-year-old man missing from Havre de Grace, according to Maryland State Police.

In a statement issued Thursday afternoon, Maryland State Police said that the man is not being identified as he is still missing and the investigation is ongoing.

A passing motorist alerted officials before 7 p.m. Wednesday that a vehicle was abandoned on US Route 1 at the Conowingo Dam, Maryland State Police said.

The vehicle, registered to a man and wife in Havre de Grace, was found with its hazard lights flashing and the engine running south of MD Route 222, police said.

When troopers contacted the Havre de Grace Police Department for information about the registered owners, they learned that officers from Havre de Grace were at the couple's home taking a missing person's report from the wife, the statement said.

The woman told Havre de Grace police that her husband was suicidal and had left a suicide note at their home, Maryland State Police reported.

On Jan. 2, Maryland State Police alerted multiple agencies which responded to the Conowingo Dam for investigation into a possible suicide.

Swift water rescue experts, Natural Resources Police and a Delaware State Police helicopter searched extensively but did not find the man.

Darkness, weather conditions and rocky terrain prevented the search from continuing until this morning, according to the statement from Maryland State Police.

Police said they continued the search Thursday but had not located the missing man as of 2 p.m.

Troopers have not yet confirmed that the husband was driving the vehicle Wednesday and said the man is still considered missing.