Two men fled empty-handed after trying to rob an Irthlingborough store.
The incident happened at the Tesco Express store in High Street between 9.10pm and 9.20pm on Sunday (March 19).
The two men entered the store and threatened staff, but scarpered without any items when challenged.
A police spokesman said nobody was injured in the incident.
Witnesses or anyone with information should contact police on 101 or Crimestoppers anonymously on 0800 555111.