QUETTA, Pakistan - A roadside bomb exploded Monday in a city in southwestern Pakistan, killing one person and injuring three more in an attack that police blamed on ethnic militants.

The bomb was planted beside a rickshaw near a busy intersection, senior police officer Hamid Shakil said.

Quetta is the capital of Baluchistan province, where the government has been fighting ethnic Baluchi militants. The Baluchi militancy is distinct from the Taliban insurgency, which the government is fighting in many parts of Pakistan.

The Baluchistan militants seek more autonomy for the province and a greater share of the profits from its many natural resources.