BROOKLYN - Four men were wounded in four separate shootings within a four-hour time period in Brooklyn Monday, making this year's Martin Luther King Jr. Day a violent one.

The first shots were fired inside an apartment building on Lincoln Place in Prospect Heights. Police say a 19-year-old man was shot in the back at around 1 p.m. He was rushed to Kings County Hospital where he is in stable condition.

Just an hour later, a 24-year-old man was shot in the torso in the doorway of a subway stop on Church Avenue. The victim was also taken to Kings County Hospital with non-life-threatening injuries as police surrounded the building and NYPD helicopters flew overhead. News 12 saw someone being taken into custody, but cannot confirm their connection to the shooting.

Police say a 53-year-old man was then shot four times in the leg on Mother Gaston Boulevard. He was rushed to Brookdale Hospital in stable condition while the suspected shooter fled the scene toward Belmont Avenue.

The fourth shooting happened at around 5:45 p.m. on Nostrand Avenue. Investigators say a 22-year-old man was shot in the leg and taken to Kings County Hospital where his condition is not known.

No confirmed arrests have been made in any of the cases.