Cleveland Browns running back Isaiah Crowell apologized on Monday for posting an offensive and graphic post on Instagram.

Last week, Crowell posted a graphic image on Instagram after police shot and killed Alton Sterling and Philando Castile. The image was posted before five police officers were fatally shot at a protest in Dallas last Thursday. Crowell posted an image which depicted a police officer having his throat slashed by an attacker and had the caption, “They give police all types of weapons and they continually choose to kill us....#Weak", according to Fox Sports.

The post has been deleted and Crowell apologized on Twitter.

"Last week was an emotional and difficult week as we saw extreme acts of violence against black men across our country as well as against police officers in Dallas," he wrote. "I posted an image to Instagram in the midst of that emotion that I shouldn’t have and immediately removed it. It was an extremely poor decision and I apologize for that mistake and for offending people. My values and beliefs do not match that image."

The Browns said in a statement that they having talked to Crowell and said that he must backup his words with actions.

Crowell signed a three-year contract with the Browns in 2014. While many people are saying that the Browns should release him because of the post, the team has no plans to do so, according to Cleveland.com. Crowell led the Browns in rushing last year with 706 yards on 185 carries, USA Today notes.

Crowell was one of many athletes who reacted to the recent police shootings on social media.