CHICAGO (CBS) — In the immediate aftermath of the deadly shooting of police officer in Dallas, former Illinois congressman Joe Walsh stirred up controversy.

In a tweet he wrote: “3 Dallas cops killed, 7 wounded. This is now war. Watch out Obama. Watch out black lives matter punks. Real America is coming after you.”

Walsh has since deleted the tweet and posted this response:

Five officers were killed and six others wounded when a gunman opened fire during a protest over two deadly police-involved shootings in Minnesota and Louisiana.

In a phone interview with CBS 2 later Friday, Walsh said Twitter temporarily shut down his page. He said some people reported him to the Secret Service.