Police say they're dealing with a serious incident at Tesco on Bowring Road in Ramsey.
Officers have blocked off all entrances and closed the store, and are asking the public to stay away from the area.
Multiple police cars were seen rushing to the scene and an ambulance leaving this afternoon, Saturday, February 7.
Armed officers are attending as well.

£5,000 fundraiser launched for Buddy's surgery
Cruise ship makes Island stopoff
Parents warned over school run parking and driving
Lord Street redevelopment case back in court
DEFA releases figures on leased land
MNH invites bids to run popular cafe
Fury finally confirms venue for Joshua fight
Quayside road closure extended in Peel