Rep. Jamaal Bowman (D-N.Y.) on Saturday pulled a fire alarm in a House building in the midst of chaotic and tense negotiations on Capitol Hill to avert a government shutdown.

Bowman was caught on camera pulling the alarm in the Cannon House building right around the time that Democrats on the House floor were stalling for time in order to review a new GOP proposal for keeping the government open.

Bowman’s chief of staff Sarah Iddrissu later tweeted that it was an accident.

It’s not clear how it could be an accident to pull a fire alarm.

Rep. Bryan Steil (R-Wis.), the chairman of the House Administration Committee, tweeted that the committee is looking into what happened.

Requests for comment from the U.S. Capitol Police and from Bowman’s office were not immediately returned.