Iran tops the list of countries that Americans consider the greatest enemy of the United States, followed by China, according to a new Gallup World Affairs poll released Monday.

Alarm over Iran’s growing nuclear capabilities, President Mahmoud Ahmadinejad’s belligerent threats of war against the United States and Israel, and the possibility of a disruption in oil flow leading to higher gas prices are propelling Americans’ negative views of the Middle East nation, according to Gallup.

For example, 87 percent of those surveyed gave Iran an unfavorable rating, the most negative measured in the survey.

The Feb. 2-5 poll of 1,029 adults found that 32 percent of those surveyed ranked Iran as the nation’s greatest enemy, an increase of 7 percentage points from last year. Almost 25 percent listed China as the top threat, followed by North Korea with 10 percent; Afghanistan at 7 percent; and Iraq, at 5 percent.