The officials further added that the two suspects belonged to Taliban commander Mullah Bozorg who are actively operating on Kandahar-Helmand highway and within the Kandahar city.
The two suspects were identified as Lal Mohammad who is originally a resident of Panjwai district of Kandahar province and Abdul Wali who is a resident of Zherai district.
According to the officials, the two militants were instructed to detonate a rickshaw vehicle packed with artillery shells in front of the entrance of government compound.
The Taliban militants group has not commented regarding the report so far.
Kandahar is among the relatively volatile provinces in southern Afghanistan where anti-government armed militant groups are actively operating in its various districts and often carry out insurgency activities.
This comes as at least six people, including four militants and a suicide bomber were killed after launching an attack in Arghandab district last week.