One person has been killed and at least nine have been injured after reported shootings in Denver.
Denver Police spokesman Sonny Jackson confirmed one person had died after reports of shootings and a stabbing at the Denver Coliseum just before 1pm on Saturday.
No arrests have been made.
Denver Health Medical Center posted a tweet an hour after the incident to say nine people had been taken to hospital.
<blockquote class="twitter-tweet" lang="en"> <p dir="ltr" lang="en">UPDATE: Confirming one party deceased and numerous others wounded in shooting/stabbing at Denver Coliseum — Denver Police Dept. (@DenverPolice) <a rel="nofollow" target="_blank" href="https://twitter.com/DenverPolice/status/693542877780021248" class="body-link" data-vars-item-name="BL-3169211-https://twitter.com/DenverPolice/status/693542877780021248" data-vars-event-id="c23">January 30, 2016</a>
The hospital has been placed on lock down to ensure safety to patients and visitors.
An anonymous witness told the Denver Post a feud had broken out between rival biker gangs.
The 38th annual Colorado Motorcycle Expo is being held at the Coliseum over the weekend.
The newspaper reported police filled the parking lot and people who left the show and crossed the police tape were not allowed to return to the building.
It said the exhibition was permitted to remain open and people were not asked to leave.
