At least three people including a brother of an independent candidate in PB-9 got injured as a vehicle hit a landmine in Makhamar area of Mavand in Kholu city on Thursday.
The Levies authorities shifted the injured to a hospital, reported 24NewsHD TV channel.
Mir Mustafa Marri, brother of Mir Liaquat Marri, an independent candidate of PB-09 constituency, got serious injuries.
The security forces after shifting the injured to a nearby hospital, started the search operation in the city.
Balochistan is facing a series of terror attacks and blasts with the start of election campaign in which more than 28 people lost their lives and dozens got injured.