Police said it wasn't clear when or by whom the flags were placed on the bridge, according to TV station WCBS. DNAinfo, a website covering New York City, reported that the NYPD's counterterrorism division was among those reviewing surveillance footage from the bridge.
Both flags were taken down by roughly 11:30 a.m. ET, according to Gothamist.
At the least police are folding up the Brooklyn Bridge white surrender flag in a respectful manner. pic.twitter.com/ltn6dydIkd
— Kevin Depew (@kevindepew) July 22, 2014
Why are there white flags on top of the Brooklyn Bridge? pic.twitter.com/cMj65jNK9e
— Mark S. Weprin (@MarkWeprin) July 22, 2014
From @wcbs880 Chopper 880: NYPD investigating how US flags were switched with white flags atop Brooklyn Bridge... pic.twitter.com/MUSCfdX41R
— Tom Kaminski (@TomKaminskiWCBS) July 22, 2014
Why does the Brooklyn Bridge have white flags instead of the usual Stars and Stripes? Did we surrender it? pic.twitter.com/ABXUmkydWf
— Matt Rivera (@mattmrivera) July 22, 2014
This post has been updated.