Two men were attacked on a J train on Friday night and now the police are looking for six to seven people who might have been involved in the attack.

The incident occurred around 9:05 p.m. on a northbound train on April 7. According to the NYPD, the "6 to 7 individuals punched and kicked the two male victims (a 29 year-old and a 53 year-old) following a dispute. In addition, one of the individuals struck the 29 year-old victim on the head with a hammer multiple times."

WABC 7 says the violent confrontation occurred when a victim "wanted to sit down... they got into an argument with another group of men, because they were taking up too much space." From the Daily News:

The 30-year-old hammer victim was on a Queens-bound J train pulling into the Bowery station when his 53-year-old pal asked a stranger taking up two seats to make room.

The seat hog complied but that didn’t stop the 30-year-old man from getting into an argument with him and six friends he was riding the train with, sparking a fight.

The suspects fled the train at the Bowery Street stop. The victim who was beaten with the hammer suffered contusions to his head and was taken to a hospital in serious but stable condition.

Police shared images of four suspects, all males in their 20s. One was described as slim, last seen wearing a gray coat and black pants; a second was described as having a medium build and last seen wearing a black jacket, black pants and yellow boots; a third was described as heavyset and was last seen wearing a black hooded sweater; and a fourth was described as slim and was last seen wearing a black and brown coat and a black du-rag on his head. The police did not have images of the other suspects, but said they were males in their 20s as well.

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). 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. All calls are strictly confidential.