Police sealed off surrounding streets 'as a precaution'
The area around Blacklock Crescent has been cordoned off as part of an investigation into reports of a gun being fired on Tuesday night.
A 25-year-old man has already been arrested and charged over the alleged incident in Longtown Road.
Officers searched two houses at about 1450 BST, and have taken away a white Peugeot car for forensic examination.
A Tayside Police spokesman said the properties were targeted as part of "an on-going firearms inquiry".
The spokesman said: "Officers taking part in the searches in Blacklock Crescent found three individuals, two men and a woman, within the first premises. They have been detained by officers for further questioning.
"A man was found within the second property and he too is assisting officers with their enquiries.
"A white Peugeot car parked in the street has been uplifted by Tayside Police for forensic examination.The spokesman added "Tayside Police will continue to maintain a reassuring high profile presence in the area."