"The Afghan National Police personnel arrested seven militants following separate raids from different locations recently," provincial police spokesman Jamal Barakzai told media.
The arrestees were found to be involved in terror crimes, including targeted shootings and bomb attacks in provincial capital Kandahar city and surrounding districts.
Police also seized three AK-47 rifles, remote-controlled mines and ammunition, the police spokesman said.
The arrested militants were handed over to a related department for investigation, he added.
The security situation has been improving in Kandahar, the former stronghold of the Taliban, over the past months, as security forces have conducted search and cordon operations across the province but the militants attack government interests in the province.
Earlier Wednesday, one police officer was shot dead and one police official wounded in two separate shooting attacks in Kandahar city, 450 km south of the country's capital, Kabul.