Police Arrest Stage Star's Ex-Boyfriend Outside Broadway Theatre Following Threatening Messages
02/23/2016 AT 02:45 PM EST
A New York City Police Department spokeswoman tells PEOPLE Christopher Horton, 28, was detained just before 2 p.m. on Saturday on aggravated harassment, stalking and weapons possession charges.
According to police, Kalukango – who portrays Nettie in the production – called 911 after Horton allegedly "followed her to her job."
Police say they encountered Horton outside the theater and allegedly found a small knife in his pocket after searching him.
Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.
Kalukango told investigators she began fearing for her life several days earlier, when Horton allegedly threatened her in a number of text messages and Facebook posts.
In one of the messages, Horton allegedly commented that "she'll feel it soon and you will all regret what you did." A subsequent message reads, "Somebody's going to die," according to police.
Another message warned Kalukango to "pay for security," the police spokesman confirms.
Horton is being held on $7,500 bail. Attempts to reach his lawyer were unsuccessful Tuesday.