Nigerian reality TV star and former Big Brother Naija Housemate, Khafi Kareem, is in a state of mourning after her younger brother was gunned dead by unknown gunmen.

According to UK Tabloids, Alexander Kareem, 20, was gunned down close to his family home in Shepherd’s Bush, West London.

He was walking home from a convenience store in the early hours of Monday morning when the incident took place.

According to eyewitnesses, he kept screening “help me” as he lay dying in the street at 12.40 am.

“His family is distraught. Alex wouldn’t talk down to anyone – he was friends with everybody, the Sun quoted a family friend as saying.

“They are all good people. His sister Khafi spreads positivity through her YouTube account. She wakes up and prays for people at 7.30 every morning.

“Alex’s brother is trying to get back from Australia to grieve with the rest of his family, his mum is completely devastated.”

His friends who also spoke to the Sun claimed he wasn’t in any gang and was friends with everyone.

“You would see Alex at the pub. He wasn’t tied up in anything, he had no beef and was a sound person.

“That’s why it has hit us hard. Nobody expected it to happen to him.

“People have made comments when they walk past here, they say he was involved in the wrong life.

“Sadly some people see a black boy in a tracksuit and assume he is a gang member, but they’re wrong.

“Alex was the fastest sprinter in primary school, where he went to Good Shepherd. He was always athletic.”

The reality TV Star had earlier gushed about the late Alex when he marked his 20th birthday.

Meanwhile, her Instagram account is currently private as she mourns her late brother.