October 5, 2019 | 7:41am
| Updated October 5, 2019 | 9:20am

Four homeless men were found beaten to death in Chinatown early Saturday and a fifth was critically injured in a terrifying Lower Manhattan rampage, police said.

Police responding to reports of an assault in progress on Bowery Street near Doyers Street in Chinatown at about 1:50 a.m. found a homeless man unconscious with head trauma, cops said.

He was pronounced dead at the scene.

Another man, 49, was taken to NewYork-Presbyterian Lower Manhattan Hospital in critical condition, authorities said.

Police searching the area then discovered three other victims just down the street, all with head trauma, police said.

The three were pronounced dead on the scene.

Two of the victims were found in front of a store on East Broadway, and the third was discovered across the street.

That’s when cops spotted the alleged killer — who was holding a three foot long, blood-covered metal objection that appeared to be from a construction site, a source told The Post.

The tight-lipped 24-year-old was taken into custody at the scene, police said.

Sources told the Post the man, identified as Rodriguez “Randy” Santos, has fourteen past arrests—including an assault charge from May.