A photo posted by TSA (@tsa) on Jul 28, 2016 at 4:47pm PDT Subscribe | UPI Odd Newsletter Subscribe SAN FRANCISCO, Aug. 4 (UPI) -- The Transportation Security Administration is reminding U.S. travelers to refrain from packing Batman-style "batarangs" in their carry-on bags. The agency posted a photo to Instagram last week showing a trio of the bat-shaped throwing stars seized from a passenger's luggage at San Francisco International Airport. Advertisement "These #Batarangs were discovered in a carry-on bag at the San Francisco International Airport (SFO). While prohibited in carry-on bags, these may be packed in checked luggage," the post said. "Passengers are not allowed to bring anything on a plane that resembles a weapon, so anything like a boomerang or anything like that would not be permitted in the airplane cabin," TSA spokesman Mike England told The Hollywood Reporter. The TSA said batarangs and other replica weapons are commonly found in the carry-on bags of people returning from events such as Comic Con International in San Diego. "Every year during Comic-Con International, our officers have issues with the various items that people purchase and then either carry-on or place in their checked bags. These come in the form of figurines, costume items (including replica and real weapons) and other mementos that generally alarm our checkpoint and checked baggage screening systems and result in a bag check," TSA social media manager Bob Burns said in a blog post. Advertisement The agency's Instagram account features numerous pictures of batarangs seized from carry-on bags. "Batarangs are becoming more and more common and it's important that you know they're prohibited in carry-on bags. They can be placed in your checked baggage along with your grapple gun, bat-saw, collapsible bat-sword, and other utility belt items," the agency said in a January post about batarangs seized in Salt Lake City. #TSAGoodCatch - Batarangs are becoming more and more common and it’s important that you know they’re prohibited in carry-on bags. They can be placed in your checked baggage along with your grapple gun, bat-saw, collapsible bat-sword, and other utility belt items. These were discovered in a carry-on bag at the Salt Lake City International Airport (SLC). Advertisement A photo posted by TSA (@tsa) on Jan 8, 2016 at 11:15am PST A photo posted by TSA (@tsa) on May 20, 2016 at 6:16pm PDT A photo posted by TSA (@tsa) on Apr 17, 2016 at 11:26am PDT Advertisement A photo posted by TSA (@tsa) on Aug 15, 2015 at 7:25pm PDT A photo posted by TSA (@tsa) on Jul 17, 2015 at 1:09pm PDT Read More Police: Spear-wielding joker threw batarang at patrol vehicle Florida police arrest 'caped criminal' Batman in string of armed robberies Times Square Batman steals $50 from tourist