Butler police Monday arrested a 20-year-old city man accused in a triple shooting in Philadelphia the day before that left one teenager dead and another teen clinging to life.

A third victim, a 20-year-old man, was critically injured but is expected to recover, Philadelphia police said.

Butler police said Malcolm O’Neal Satchell was arrested without incident about 3 p.m. at 125 Standard Ave., his listed address, on a murder warrant Philadelphia police obtained only hours earlier.

District Judge Kevin O’Donnell later that night arraigned Satchell on one count of homicide, two counts each of attempted homicide and aggravated assault, and other charges.

He was placed in the Butler County Prison without bail, following arraignment. Philadelphia police were to arrive in Butler, possibly today, and take custody of Satchell.

He will be jailed in Philadelphia while awaiting his preliminary hearing on charges in the shooting, authorities said.

Investigators say Satchell shortly before 4 p.m. Sunday opened fire inside of a house on Jasper Street in northeast Philadelphia.

When police got there they discovered 19-year-old Malcolm McCauley dead with a gunshot wound to the head, according to court documents.

Officers found two other young men, 19 and 20, had been shot, too. The younger man was shot in the head and the other was shot at least twice in the body.

All three victims, police said, were found inside the second-floor front bedroom.

The injured men, who police did not identify, were taken to nearby Temple Hospital.

The 19-year-old was admitted in “very critical” condition, police said. The 20-year-old was listed Tuesday in critical condition.

Homicide unit investigators did not immediately speculate about a possible motive, including any drug connection.

Police, however, reportedly found stamp bags of suspected heroin inside the home.

The crime unfolded in the city’s Kensington neighborhood, known for its numerous so-called “drug corners” and a reputation as being one of Philly’s hottest heroin zones, said police Sgt. Charles Coan.

“It’s a high-crime area,” he said. “There’s a lot of vacant empty storefronts and vacant lots. And a lot of poor.”

Detectives early Tuesday morning spoke to the older survivor, who identified the shooter as “Bunch,” Satchell’s street name, police said.

The man said that he fell asleep Sunday and was awakened by gunfire. He opened his eyes and noticed McCauley had already been shot.

He also told detectives that he saw the defendant, who he has known for several years, pointing a handgun at him, documents said.

“(Satchell) stated to the (20-year-old) ‘go to sleep’ and began shooting him,” according to a police affidavit. He said the suspect then left.

Two other people in the house, identified only in court papers as Witness No. 1 and Witness No. 2, implicated Satchell.

Both witnesses previously knew the suspect and recounted seeing him with a handgun several hours before the shooting.

Asked why he had the gun, Satchell told the second witness “to mind his/her business,” the affidavit said.

Following the gunfire, police said, the first witnesses recalled seeing Satchell leave the second-floor front bedroom “in a calm manner” while holding a small suitcase.

That same witness heard one of the victims cry out that he had been shot and yell for help.

Both witnesses ran to a neighbor’s house where they remained until police got there.

Coan said investigators could not immediately say why Satchell was in Philadelphia, or explain his relationship to the others — victims and witnesses — at the home on Jasper Street.

Police were just as uncertain how Satchell returned to Butler. Investigators did not rule out that he booked a ride on a bus and hightailed it back here.

Butler police Capt. David Dalcamo said his department Monday afternoon received a telephone call from police in Philadelphia, asking for help in finding the suspect.

Dalcamo said police checked their database and turned up Satchell’s address on Standard Avenue.

Dalcamo did not know how long the suspect had lived in Butler. At his video arraignment, Satchell told O’Donnell he has lived here for about a year.

Several tickets for a traffic violation Sept. 28 in Butler showed the defendant with a Center Avenue address.

Other traffic tickets city police issued in March and Butler Township police wrote Oct. 23 showed his current address.

Satchell has no criminal record in adult court in Pennsylvania, authorities confirmed.

Dalcamo said that when six officers arrived at Satchell’s Standard Avenue apartment, Philadelphia arrest warrant in hand, the suspect’s uncle, Cory E. Sanders, 62, answered their knock at the door.

Sanders, who told police he lives there, acknowledged Satchell was inside and police took the defendant into custody.

Police also took some of Satchell’s belongings but they did not search the apartment. They asked him no questions related to the charges in the warrant.

Sanders, meanwhile, also was arrested on a bench warrant stemming from a drunken driving case in Philadelphia.

He was placed in the county prison. A jail officer said authorities in Philadelphia plan to make arrangements to come and get Sanders.