TEHRAN - Top Iranian officials said on Saturday that the United States and its regional allies are responsible for an earlier terrorist attack in Iran.

At least 25 people were killed and 60 others injured in a terror attack on a military parade in Iran's southwestern city of Ahvaz on Saturday, official IRNA news agency quoted Ali Hossein Hossein Zadeh, political deputy of the Khuzestan governor, as saying.

Military forces and citizens who had gathered to watch the parade were among the killed, the report said.

"This crime is the extension of the plots by the U.S. allies in the region, seeking to create insecurity in Iran," Iran's Supreme Leader Ayatollah Ali Khamenei said in a statement.

However, the Iranians "will continue their path of honor and overcome all the hostilities," Khamenei added.