Two more apparently random subway attacks were reported in the Big Apple on Sunday — part of a recent surge in transit violence in the city.

The latest reported attack occurred at about 3:30 p.m. aboard a No. 2 train in Manhattan, when a 61-year-old man was assaulted by a knife-wielding suspect near 34th Street–Penn Station, according to police and law-enforcement sources.

The victim was taken to Weill Cornell Medical Center and the suspect fled in an unknown direction, police and sources said.

About two hours earlier, a 63-year-old man was attacked by a man with a padlock at the Grand Central 42nd Street station in Manhattan, police and sources said.

That victim was taken to Bellevue with serious injuries, police said. His alleged attacker, identified by police as Devante Gibson, was later arrested.

The 25-year-old suspect was charged with assault and criminal possession of a weapon, police said.

The city has been plagued by a rash of transit violence in recent weeks, including a brutal series of stabbings along the A line over the weekend, police said.

Those incidents left two homeless people dead and two men wounded, cops said.