It is believed the thieves made off past the park and up the path pictured.
Three men stole drills from a store before they were chased away before escaping in a getaway vehicle.
The theft happened at Homebase in St Albans Retail Park, Griffiths Way, at 3.20pm yesterday.
Three men went into the shop, which is closing down, before stealing two drill sets and running off.
It is believed they were chased by two people towards a nearby park by the Cottonmill level crossing.
They were last seen getting into a silver Citroen C4 Picasso.
They were dressed in dark clothing and were wearing hats.
Anyone who saw what happened or has ay information should contact police on 101 quoting crime reference 41/57981/18.
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