A threatening note was “discovered near the door” of Sen. Dean Heller’s (R-NV) Las Vegas office on Sunday.

In a statement to TPM, the Las Vegas Metropolitan Police Department said an alarm company representative called the police just past 9 a.m. on Sunday, reporting a potential burglary. Though police did not find evidence of a burglary of Heller’s office, nor the building in which it is located, the statement said: “[A] threatening note addressed to Senator Heller was discovered near the door to his office.”

“Officers took a report for Threatening or Obscene Letters or Writing (NRS 207.180),” the statement continued. “The LVMPD has an on-going investigation into this incident.”

Citing the investigation’s open status, LVMPD did not disclose the note’s content.

The Nevada Independent’s Jon Ralston, citing an unnamed law enforcement source, reported that the note “was from someone asserting that he would lose his health care if the key senator voted for the repeal bill and that he would die if that happened and would take Heller with him.”

Widely seen as a potential dissenting voice on Senate Republicans’ Obamacare repeal bill, Heller has faced constituent pressure in recent weeks to block the bill from receiving a vote in the Senate.

H/t KLAS.

This post has been updated.