A former NATO Secretary-General and Danish prime minister has been named an adviser to Ukraine's president.

Anders said on Twitter Saturday that he will do his "utmost to promote security, economic reforms and stronger EU ties."

A statement on Ukrainian President Petro Poroshenko's website did not specify on what issues Fogh Rasmussen might concentrate.

Fogh Rasmussen described the security situation in eastern Ukraine "alarming" on his Facebook page. Ukrainian forces have been fighting Russia-backed rebels in eastern Ukraine for two years and more than 9,300 people have been killed.

Ukraine, which wants to join the 28-nation European Union, also "must implement much needed reforms," including "enhanced fight against corruption."

The 63-year-old Dane was NATO chief 2009-2014 after his eight years as Danish head of government.