The arrested person was identified as Om Brahmbhatt.
Police said he is accused of shooting Dilipkumar Brahmbhatt, 72, Yashkumar Brahmbhatt, 38 and Bindu Brahmbhatt, 72.
"Dilipkumar and Bindu Brahmbhatt sustained gunshot wounds and were pronounced deceased at the scene. Yashkumar Brahmbhatt, sustained multiple gunshot wounds and was transported to the hospital, where he succumbed to his injuries and was pronounced deceased," read a statement issued by the South Plainfield Police Department.
"The perpetrator Om Brahmbhatt, 23, of South Plainfield, resided with the victims and was found at the residence when authorities arrived at the scene," read the statement.
"The investigation led to Om Brahmbhatt being arrested without incident today, November 27, 2023, and charged with three counts of first-degree Murder and three counts of second-degree Possession of a Weapon for an Unlawful Purpose," the statement said.
Police said the case is currently under investigation.