Police are looking for two men following reports of shots being fired in Slough.
Armed officers from Thames Valley Police were called to Stoke Road near the town's train station at 16:10 BST on Friday.
No one was injured and police have confirmed it is not being linked to terrorism.
They are looking for two men described as white and in their late teens to early twenties.
One man was wearing a dark Puffa-style camouflage jacket and the other was wearing a grey hooded top and had ginger hair and a beard.
Det Insp Stefan McLaughlin asked for witnesses to come forward, including those with dash cam or mobile phone footage.
The force said there will be an "ongoing police presence" in the town.