Uruguay warned its citizens not to travel to the United States.

Axar.az reports citing The Uruguayan Foreign Ministry that more than 250 people have been killed in the United States over the past six months.

Most of those killed were victims of hatred, racism and growing violence, the Foreign Ministry said.

"Take top security measures against this. Especially when you are away from crowded parks, shopping malls, festivals, religious places and so on."

As a result of armed attacks in El Paso, Texas, and Dayton, Ohio, 30 people were killed and many were injured.

At least 14 people were injured in two terrorist attacks in Chicago.