Alexander, the younger brother of ex-Big Brother Naija housemate, Khafi Kareem, was shot dead in London on Monday, the Sun reports.

The 20-year-old was reportedly shot on his way home after a visit to the convenience store and a post-mortem has concluded that he died from gunshot wounds to his chest and abdomen.

Reacting to the news, Khafi shared a black square on Instagram on Saturday.

She simply wrote, ’00:40′ and added a broken heart emoji

The 29-year-old posted a picture with Alexander, who has been described by friends as a “goofy guy who always had a smile on his face,” when he turned 20 in March.

She wrote, “I thank God for your life and do not take you for granted!! I love you very much and I’m so proud of everything you are doing for yourself.

“You are a go getter and I pray God blesses every step forward you are making.”