A teenage girl was punched in the face and had her mobile phone stolen, in Boston, in the early hours of Sunday morning.
A police spokesman said the incident happened some time between 2-4pm, when the girl, 17, was on West Street near the Axe and Cleaver.
She got into conversation with a group of males, one of which, a young black male, punched her and stole her Blackberry phone.
A man is in custody helping police with their enquiries.
If anyone has any information please contact the non-emergency number 101.