The US soldiers were seized in Sistan-Baluchestan, a province that borders Pakistan and Afghanistan [GALLO/GETTY]

Iranian border guards have detained seven US soldiers as they tried to illegally enter Iran, the semi-official Fars news agency reports.

The report on Sunday gave no source for the information.

"Recently seven American troops were detained by Iranian guards in a southeastern province of the country ... Two Iranians accompanying the troops were also arrested," Fars said.

No other news agency reported the incident, which Fars said occurred in Sistan-Baluchestan, an impoverished province that borders Pakistan and Afghanistan.

Source: Reuters