Two Waikato service stations were the target of thieves who smashed their way on both occasions and made off with cigarettes.
Waikato police Sergeant Paul Van De Zee said it was too early to say if the two aggravated robberies - hitting Z service stations in Te Awamutu and Hamilton - were linked.
The first happened at 11pm last night at Z Sloane St, Te Awamutu.
Van De Zee said the attendant saw the group coming so managed to barricade himself in an office as the three offenders smashed their way inside, as their getaway driver waited outside.
Police are now wanting any information or sightings of a silver station wagon, possibly a Mazda, last seen speeding from the scene on Sloane St towards Albert Park Dr. It is believed the vehicle may have been stolen earlier in the night from Hamilton.