UPDATE 3:40 PM: The gunman who ambushed two Pennsylvania state troopers late Friday night, killing one and injuring the other, is on the loose and dangerous, authorities said at a Saturday afternoon press conference.

The trooper killed was identified as Bryon Dickson. The other trooper was injured and taken to Geisinger Medical Center in Scranton, where he is in stable condition after undergoing surgery.

A late-night shooting during a shift change at a Pennsylvania State Police barracks left one trooper dead and another injured in a targeted ambush on the officers, sparking a multi-state search for the potential shooter or shooters.

FoxNews.com reported:

One trooper was leaving the barracks in Pike County's Blooming Grove and another was arrived when shots were fired just before 11 p.m. Friday, State Police Commissioner Frank Noonan said. He confirmed that one trooper was killed and the other was injured and taken to Geisinger Medical Center in Scranton, where he was in stable condition.

Noonan said the attack seemed to be directed solely at state police.

"This has been an emotional night for all of us," he told reporters.

Law enforcement officials from across the region, including New York and New Jersey, descended on northeastern Pennsylvania to help with the search. The Blooming Grove barracks is in a wooded area, surrounded by state game lands.

Noonan said authorities did not have a description of the shooter or shooters but said they were following several leads.

"We can't say that the situation is completely in hand" he said. He said police did not believe the general public was at risk, but they are asking everyone to be on the lookout for anything suspicious.

Several roads around the barracks, including parts of Interstate 84, were closed Saturday morning. Blooming Grove is a township of about 4,000 people about 35 miles east of Scranton.

Watch the clip above.

Dramatic Video Gives Firsthand Look at Deadly Police Shootout

Woman Sentenced for Buying Gun Used in Texas Cop Shooting, 2 Murders