Story highlights The image shows a silhouetted figure wearing a Stars and Stripes lapel pin

It carries a quote saying "the aggressive and criminal U.S." will lose any war with Iran

"The Supreme Leader says many things that we find completely objectionable," the White House says

(CNN) Regardless of the recent deal over Iran's nuclear program, officials in Tehran are still taking sharp jabs at the United States.

A Twitter account affiliated with Iran's Supreme Leader, Ayatollah Ali Khamenei , posted an image over the weekend that appears to portray U.S. President Barack Obama holding a gun to his own head.

The picture shows a silhouetted figure holding the gun. No facial features are visible -- only a white shirt, red tie and a Stars and Stripes lapel pin stand out from the shadow.

"US president has said he could knock out Iran's military," the tweet says.

US president has said he could knock out Iran's military. We welcome no war, nor do we initiate any war, but.. pic.twitter.com/D4Co7fVuVg — Khamenei.ir (@khamenei_ir) July 25, 2015

It then continues with a quote attributed to Khamenei from July 18 that's written out in full on the image: "We welcome no war, nor do we initiate any war, but if any war happens, the one who will emerge (the) loser will be the aggressive and criminal U.S."