Update: 8:15 a.m.
Authorities have announced the capture of Wisconsin fugitive Joseph Jakubowski.
The Rock County Sheriff's Office said officers in Vernon County received a report of a suspicious person on a farmer's property in Readstown, Wisconsin on Thursday evening.
The suspicious person complaint reported that a male matching the description of Jakubowski was camping at that location and refused to leave when he had been asked to do so.
A perimeter was established and tactical support was sent in to investigate, eventually making contact with the man just before 6 a.m.
He was taken into custody without incident and identified as Joseph Jakubowski.
More details will be revealed at a press conference at 2 p.m. Friday.
Here's the story from 7:45 a.m.
Police in Wisconsin are investigating a letter threatening violence against churches on Easter Sunday that they believe may have been sent by fugitive Joseph Jakubowski.
The manhunt continues for the 32-year-old, who is believed to be heavily armed after stealing 18 guns and two silencers from the Armageddon Supplies in Janesville on Apr. 4, since when he has been on the run with 150 law enforcement officers searching for him.
In an update on Thursday night, the Rock County Sheriff's Office said authorities in Waukesha County are investigating a threatening letter sent through the U.S. Post Service threatening "unspecified violence at unspecified churches" in the Sussex area, west of Milwaukee.
"The threatening letter was purported to be sent by Jakubowski," the sheriff's office said, adding that it's now being analyzed for its authenticity.
The Associated Press reports that with Jakubowski still at large, the annual Easter Egg Hunt hosted by Wisconsin governor Scott Walker, which had been scheduled for Saturday, has been canceled.
Reports that he had spoken of a plan to steal guns and use them for an attack has already seen several schools close this past week, amid fears that they would be targeted. Police have since said the threat to schools has been minimized.
Jakubowski is also reported to have sent a copy of a 161-page anti-government manifesto to President Donald Trump.
TMJ4 obtained part of that manifesto and revealed the details on Thursday, with Jakubowski citing specific details of how he was wronged by the government, which he refers to as a "gang of terrorists," and says health insurance, taxes and religion are examples of the government trying to brainwash citizens.
"We the people should be out for these sick minded people belonging to the system! We need to spill their blood!" he wrote.
Jakubowski is considered armed and dangerous. Direct sightings of him should be called in to 911. Any general tips and historical information should be called in to the FBI on 1-800-CALLFBI or the Rock County Sheriff’s Office Tip Line: 608-757-7911.
The FBI is offering a cash reward of up to $20,000 for information that leads to the successful apprehension of Jakubowski.