The 60-year-old victim was attacked and suffered a head injury in Hoe Street on Tuesday morning.
Paramedics rushed him to a hospital where he died a day later.
Police arrested the suspect yesterday at around 11pm.
The victim’s family have been informed and a formal identification will take place in due course.
He remains in custody and enquiries continue.
Anyone with information is asked to call the Incident Room on 020 8345 3985 or police on 101 quoting CAD 2319/04APR.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org.
Tags: Dagenham, Walthamstow
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