WASHINGTON — Mysterious flashing red lights were spotted from the White House on Sunday night and social media has lit up with plenty of wild explanations.

TV cameras regularly positioned on the White House caught the red strobe lights around 8:30 p.m. Sunday. The pulsing light seemed to be emanating from two windows on the second floor of the residence.

President Trump was home at the White House following his nine-day foreign trip.

Spokespeople for the White House and the US Secret Service have not yet commented on what the red lights were. But social media erupted with plenty of theories, ranging from a disco dance party to a back-channel code to the Russians.

Some Twitter users joked it was a Trump tanning bed on the fritz or the president unwinding with an intense game of Operation.

One practical suggestion was the lights were merely a reflection from an emergency vehicle in the area.

It was Trump’s first full day at the White House since his inaugural foreign trip and he was huddling with advisers on the latest developments in the Russia investigation that has now swept up his son-in-law Jared Kushner.

Others mused that Trump brought home the glowing orb from Saudi Arabia.

The red lights lasted for about 20 minutes, according to NBC’s “Today” show. They haven’t been spotted since.

“As of this morning, the red light mystery lives on,” said NBC’s Dylan Dreyer.