Police are searching for two other men in connection to the gang-related killing of a 20-year-old on a Queens subway platform on Sunday afternoon, police said.

The men wanted for questioning are both believed to be between 30 and 35 years old, cops said.

One was last seen wearing a dark-colored hat, a red scarf, a sweatshirt and white sneakers, police said. The second was last seen wearing a hooded sweatshirt, black pants and black sneakers.

Earlier on Monday, police officials said an argument about the MS-13 street gang aboard the No. 7 train sparked the shooting on the 90th Street station platform, which killed 20-year-old Abel Mosso.

“Someone was yelling something about MS-13,” NYPD Chief of Detectives Dermot Shea said during a press conference, adding that the “victim was affiliated with the 18th Street Gang,” he added.

Cops took the 26-year-old suspected shooter into custody on Monday, police said. Charges against him were pending.