Police were called to a report of an assault on Benny Parr Close, Lower Soothill, just after 9pm yesterday (Sunday).
Several men are reported to have been attacking a man in his thirties with baseball bats.
Three people have been arrested in connection with the incident and remain in custody.
Detective Inspector Di Johnson said: “We believe this was a targeted attack and enquiries remain ongoing. Our officers remain in the area today.
“I would ask anyone who has any information and has yet to speak to police to please contact officers.”
Anyone with information is asked to call 101, quoting crime reference 13200310317.
Police do not believe incident is linked to the death of a 20-year-old man two miles away in Park Croft, Batley, in which a man has been arrested on suspicion of murder.