Police were called after a man was assaulted and suffered a head injury in a shop in Broadway Parade, Hornchurch.
Officers attended the scene at 4.50pm today.
The man, who is believed to work in the shop, was taken to hospital to be treated for a head wound.
His injury is not life threatening, police say.
A woman has been arrested on suspicion of assault.
Havering officers are investigating,
Have you seen what happened? Contact chloe.farand@archant.co.uk
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