London, Feb 02 : U. S. president Barack Obama's Kenyan half-brother, George, says that he is not a drug user after being arrested in Nairobi for alleged possession of marijuana.

The 24-year-old, who was the son of Obama's father by his second wife, denies the allegation, insisting that it's all a misunderstanding.

George spent two hours in a police cell before being released.

"It was all a misunderstanding. Look, I don't feel comfortable talking about this, but I don't do drugs," Times Online quoted him, as saying.

George was one of the president's few close relatives who did not travel to Washington for the inauguration on January 20.

Obama's young half-sibling was in the headlines last year after it was revealed that he was living in a corrugated iron shack in a sprawling slum as his brother ran for the most powerful job in the world.

The two met previously when Obama visited his ancestral homeland in an encounter that he described as a `painful affair' in his memoir Dreams from My Father. (ANI)