© Mark Thomas/ Global Look Press
"To blame this on immigration from Africa is preposterous and we should call him out when he does so," Khan, speaking on the BBC's Radio 4 Today programme on Friday morning, said.
Khan made the remarks after Trump doubled down on his claims that the mayor had failed to do enough to protect London from Islamist terrorist attacks.
In a bombshell interview, which was published in The Sun tabloid newspaper on Friday, Trump said: "I think he has done a very bad job on terrorism. I think he has done a bad job on crime, if you look, all of the horrible things going on there, with all of the crime that is being brought in."
It is the latest spat between the president and mayor, who have been at loggerheads ever since Trump publicly berated Khan for saying there is "no reason to be alarmed" by an increased and armed police presence in the city in the aftermath of the London Bridge attack in June 2017.
That broadside was followed by Khan calling for Trump's visit to the UK to be cancelled, saying his "policies go against everything we stand for".
Khan is also likely to have enraged Trump when he gave the green light for 'Trump Baby' - a 20ft, orange blimp depicting the US president as an angry infant in diapers - to be flown over the city during anti-Trump demonstrations. Over 50,000 people are expected to descend on central London on Friday to protest the leader's visit.
I personally know british muslims I know american muslims from Iran from egypt from lebanon and although they know I am thick skin christian no bullshit about jews and preach to me I watch how meticulous people present things and I stand up to why people reason things. They dont hate me because I am strong. I wont bring wrong information to religion, I want authenticity and people to ask or write or believe or insinuate any normal course of action and act upon that when someone is raised wrong. Its not your problem. You are selfish, retarded so act relaxed and act stupid or ruin man with science and clear unambiguous superiority you were never aware of before you came of age. Think alone with yourself and go to extremes alone and find people like we used to and live outloud or trap yourself in hate and die as a news makes headlines about your philosophy in life laughing at your pain at the end.
Brainstorm ruination is your last help out of boredom of being tired of fighting for your lazy fucked up up bringing you cant even produce something without writing fake or telling someone or giving it, your genetic worth will plunder and fake all records to begin as a shit from a potato bugs ass in every sense of your life - draw amazing portals to the gift of life and withdream-like energy free oppressed people from minute maker dipshit catastrophe working disfuctional men. Pray for meanings not peace. Know your father and greive for your soul.