The suspect who shot a Manhattan straphanger in an attempt to snatch his phone Monday evening had just robbed a bank at gunpoint 10 minutes earlier, authorities said.
The gunman approached a 42-year-old man on a northbound N train just before 5 p.m. — pointing his weapon while demanding the victim’s cell phone, cops said.
The victim pulled out his phone — but didn’t do it quick enough for the suspect’s liking, police said.
The suspect blasted the straphanger once in the left thigh and fled when the train entered the Union Square station, authorities said.
Cops now believe the same armed suspect entered a TD Bank further downtown, on Canal Street near Lafayette Street, 10 minutes earlier.
He walked up to the teller counter, displayed his gun and demanded, “I have a gun, give me cash,” cops said.

The teller forked over about $1,100 to the gunman, who took off, heading east on Canal Street.
Meanwhile, a day earlier, police also believe the same suspect approached a 42-year-old man from behind as he ordered food inside a deli on Lexington Avenue near East 41st Street.
The suspect lifted up his shirt to display a gun in his waistband and demanded the victim’s property, cops said.

The victim took out his wallet and pulled out about $45 — but the gunman turned it down, grumbling, “That’s it?” according to cops.
No injuries were reported.
The suspect fled toward Grand Central Station, where a surveillance photo of him was obtained.

Cops also released photos of the suspect from the scenes of the two later incidents. He was still on the loose Tuesday morning.