QUETTA: Four people were killed on Sunday, including two policemen, in two seperate incidents of violence in Balochistan, officials said.

In one incident, at least two people were killed and another ten injured in a powerful blast on Sariab road area of Quetta, police said.

Muhammad Riaz, a police official told Dawn.com unknown militants had planted an improvised explosive device on a cycle, which was parked on the road side.

The strength of blast damaged shops and windows of nearby homes and moving vehicles on Sariab road.

"The loud and powerful sound of blast was heard far and wide", he said.

Riaz said that six to seven kilogram of explosives were planted in the cycle.

All ten injured were rushed to civil hospital Quetta for medical treatment. Emergency was imposed in civil hospital, doctors and para-medics were called to treat the injured.

"All dead and injured were civilians", Riaz said. He said it was yet to be confirmed as to the target of the blast. However, frontier corps and policemen were quick at the scene.

They cordoned off the area and started investigation into the incident.

The blast resulted in blockade of Sariab road and long queues of vehicles were witnessed on the road.

Muhammad Idrees, a paramedic in civil hospital told Dawn.com that the condition of two injured people was serious.

Sariab road is one of the sensitive and troubled parts of Quetta city.

Militants continue to target security forces, railway tracks and other national installations in the area. There was no immediate claim of responsibility for the attack.

In another incident, armed militants killed two policemen and injured another in Loralai, 260 km north of Quetta.

A police officer, who requested not to be named, told Dawn.com militants in a vehicle and a motorcycle opened fire at police mobile checkpost in Zangwal area of Loralai.

He said two policemen were killed on the spot whereas one was injured. The assailants escaped unhurt from the spot.

Police and levies reached the spot and have started an investigation into the incident.