Ugandan politician Robert Kyagulanyi Ssentamu, better known as pop star Bobi Wine, has narrated the beatings he allegedly received from security officers after his arrest.

In a 3,611 word statement posted on his social media platforms, Mr Kyagulanyi - who is currently undergoing specialised treatment in the US - said he wanted to "set the record straight."

“They beat me, punched me and kicked me with their boots. No part of my body was spared,” Mr Kyagulanyi said in what was his first public statement since his arrest.

The lawmaker further alleged that security officers beat him and squeezed his genitals until he lost consciousness.

"They wrapped me in a thick piece of cloth and bundled me into a vehicle. Those guys did to me unspeakable things in that vehicle! They pulled my manhood and squeezed my testicles while punching me with objects I didn’t see.

Treason

"I continued to groan in pain and the last I heard was someone hit me at the back of the head with an object," Kyagulanyi said.

The lawmaker was arrested last month and charged with treason after some of his supporters allegedly stoned President Yoweri Museveni’s car.

He was released on bail before being re-arrested while trying to leave the country to seek medical treatment. He was subsequently allowed to depart.

His case has drawn international attention with a number of musicians, activists and politicians signing an open letter condemning his treatment by the government.