Armed police arrested four men after they received reports of a group of men running down a city road armed with bladed weapons.
Firearms officers were deployed after police were alerted to the incident in Aylestone Road, Leicester, at 8.05pm yesterday.
The officers entered a property on Aylestone Road and arrested four men.
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Men aged 17, 18, 18 and 19, all from Leicester, were arrested on suspicion of robbery.
A number of knives were recovered from that property.
A police spokesman said: "We received reports that a group of men were running down Aylestone Road, Leicester, armed with what appeared to be bladed weapons."
Police said that all four men are still in custody.
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