A homeless maniac was arrested for a bloody stabbing rampage at Penn Station Sunday evening that left five innocent bystanders with knife wounds, sources told The Post.

Hector Deleon, 51, unleashed the unprovoked attack around 7 p.m. inside the New Jersey Transit boarding area, filling the station with the blood-curdling screams of the victims as crowds of terrified commuters ran for their lives, sources said.

Deleon is believed to be homeless, the sources said.

The grisly attacks come less than 24 hours before President Trump is expected to arrive at Madison Square Garden for Game 3 of the Knicks’ historic NBA Finals appearance against the San Antonio Spurs.

Sources told The Post that the victims, who were all men, range in age from 30 to 60 and are all believed to be innocent bystanders who were attacked by the deranged perp after he brandished a knife at them.

Straphangers told The Post Monday they were disturbed by the attack, which left splatters of blood on the floor of the boarding area.

“Wow, I mean, I guess I’m not surprised, though. I mean, Penn Station is not known for being the most safe area, especially in the evening, especially with just how busy it’s been recently with the Knicks game, the Trump coming,” said Sanai Rashid, 21.

“It’s been a bit of a messy summer in general. I think crime does go up as well, but I do think there probably should be more security in Penn Station, but that’s devastating.”

Marina Berger, 21, an advertising intern from New Jersey, said the incident frightens her, particularly as a solo female traveler.

“It’s definitely very upsetting to hear, especially as like a young woman who’s just recently going to have to commute to the city pretty often, and I definitely think there should be better security measures put in place.”

Emma, 30, a dental hygienist who was outside Penn Station with her 7-year-old son, Leonardo, said the incident gives her pause about riding the rails.

“It freaks you out, it makes you wonder if you should even be using the subway with your kids, especially because, I mean, there’s always creepy people in the subway, but you never really think that you’re gonna be there during the time that something like that happens,” she said.