Reykjavik - Iceland's President Olafur Ragnar Grimsson has broken his left shoulder in a horse-riding accident, news reports said Thursday.

Grimsson was riding Wednesday with a group of people including his wife at Hunavellir in the north-west part of Iceland when his horse tripped and he fell off, the reports said.

The president was taken to a hospital in Reykjavik where X-rays indicated that he had sustained a broken shoulder. Some 10 years ago the president sustained a similar injury.

Grimsson has served as president since 1996, and last year was re-elected for a fourth four-year term. (dpa)