LGBT rights group the Human Rights Campaign (HRC) evacuated its offices in Washington, D.C., Tuesday afternoon after the Los Angeles Police Department (LAPD) received an unspecified bomb threat against a "national gay rights organization," according to reporting from Metro Weekly. Other LGBT rights organizations, including nearby National Gay and Lesbian Task Force and the National Center for Transgender Equality, evacuated their offices as well.

"Earlier this am our LAPD 911 dispatch got call from a caller who says he was going to blow up LGBT bldg in DC. They got call about 8am PST. We imediately got in contact with MPD to advise of the threat. We also started an investigation into the threat. It looks like the call came from local (LA) pay phone. As of 1230 PDT no additional evidence was found to validate the threat. The investigation is ongoing," LAPD said in a statement to WTOP 103.5 FM.

HRC President Joe Solmonese told Metro Weekly that this was the second time its headquarters in downtown Washington has received a bomb threat since he became president in 2005.

The threat comes less than a week after President Barack Obama and several other high-level Democratic officials have publicly endorsed same sex marriage.

[The Human Rights Campaign offices in downtown Washington, D.C., via NCinDC / Flickr]