Police say two people who tried to abduct a British serviceman outside a Royal Air Force Base three days ago were probably part of a larger team.

Norfolk Police said Saturday the serviceman only saw two people, including one with a knife, but that others were likely involved.

The serviceman was running near the RAF Marham base in Norfolk when he was grabbed by a man who tried to force him into a van. The man had an accomplice carrying a knife but the serviceman escaped unharmed.

The incident Wednesday shared some elements of the 2013 attack on soldier Lee Rigby, who was stabbed to death on a London street in by two al-Qaida-inspired extremists.

Police are asking for help locating two suspects, said to be of Middle Eastern origin.