Interior Secretary Balochistan Akbar Hussain Durrani confirmed that a remote-controlled device was exploded on a way where convoy of security forces passes by.
Nearby window glasses were shattered due to intensity of the blast.
Separatist terror outfit United Baloch Army claimed responsibility of the attack.
According to AFP, the blast on the outskirts of Quetta, the capital of southwestern Baluchistan province, came during the morning rush hour.
“A man riding a bicycle was killed in the explosion on the Sirki road, as eight others including two schoolchildren aged 10-12 years, were injured in the incident,” Akbar Hussain Durrani, the home secretary of the province, told AFP.
“The school van these children were boarding also damaged.”
Durrani said that the target of the bomb, which was planted in a car, was not immediately clear but security forces patrol in the area. No security official was hurt in the explosion.
Another senior police official, Aitezaz Goraya, also confirmed the blast and toll.