QUETTA: An improvised bomb planted on a motorbike killed six people in Chaman on Monday, police said.

A vehicle carrying personnel from the country's anti-narcotic force was believed to be the target of the blast in the town, which borders Afghanistan, senior police official Razzaq Cheema said. "The explosion killed six passers-by and wounded 10 others, two of them critically," he told AFP.

Local police official Masood Khan confirmed the attack and casualties. No group immediately claimed responsibility for the attack. Interior minister Ejaz Shah said in a statement that "such attacks are aimed at spreading fear among the people".