The NYPD is seeking the public's help in identifying two men suspected of assaulting and robbing F train riders in Queens.

According to the NYPD, there have been three attacks:

1) On Tuesday, September 02, 2014 at approximately 0410 hours, a 23 year-old man was walking up the stairs of the 169th Street "F" train line subway station, when two unknown males grabbed him from behind. The suspects threw the victim to the ground, punched him in the face and removed his wallet from his back pocket. The suspects then fled the location.

2) On Tuesday, September 30, 2014 at approximately 0900 hours, a 30 year-old man was riding the northbound "F" train when he was approached by two unknown males. One of the males punched the victim in the face and demanded the victim's iPad. The victim exited the train at Sutphin Blvd station with the suspects following. The suspects, without receiving the iPad, fled the scene.

3) On Wednesday, October 08, 2014 at approximately 1340 hours, a 33 year-old male was seated aboard a southbound "F" train and when the train stopped at Parsons Blvd. an unknown male snatched the victim's cellphone from his hand and fled. When the victim tried to give chase a second unknown male punched him in the face.

Police released surveillance video of the two suspects, who appear to be in their 20s:

Anyone with information in regards to these incidents is asked to call Crime stoppers at 1-800-577-TIPS (8477). The public can also submit their tips by logging onto the Crime stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577.