The satirical newspaper’s Twitter accounts and related story Thursday reporting gunshots and hostage-taking in the Capitol came a day after the FBI arrested a man accused of planning to bomb the Pentagon and the Capitol with explosive-filled model airplanes.

“It has come to our attention that recent twitter feeds are reporting false information concerning current conditions at the US Capitol,” Capitol Police spokeswoman Sgt. Kimberly Schneider said in a statement.

She said conditions at the Capitol, now largely empty because lawmakers are on vacation, were normal. “There is no credibility to these stories or the twitter feeds. The US Capitol Police are currently investigating the reporting.”

The Onion tweets and article spoke of congressional leaders “brandishing shotguns and semiautomatic pistols,” taking a class of schoolchildren hostage and threatening to kill them if they didn’t get $12 trillion in cash.

It showed a doctored picture of Republican House of Representatives Speaker John Boehner holding a gun to a child’s head and reported that Senate Majority Leader Harry Reid was firing a handgun and wearing a black pantyhose over his head.

Boehner’s office had no comment.