A third blast near airport road followed two earlier suicide explosions in Quetta on Tuesday evening.
Eight security personnel were injured in the three explosions in different areas of Balochistan's provincial capital.
Two suicide explosions near a camp of the Frontier Corps in Quetta's Mian Gundi area were reported earlier today.
According to reports, a suicide bomber had opened fire near the gate of Frontier Corps 64 Camp. As security forces took positions to respond to the firing, the man blew himself up, said security sources.
While security forces approached the dead suicide bomber, another bomber blew himself near the camp's gate.
The area was cordoned off immediately after the incident.