Pakistan election: Two deadly blasts in Balochistan day before vote

Two bomb explosions have killed at least 20 people in Pakistan's Balochistan province on the eve of general elections, officials say.
The first blast killed 12 people in front of an independent candidate's party office in Pishin district.
A second explosion left eight people dead in Qillah Saif Ullah district, about 150km (93 miles) away. Many others were injured in the two blasts.
The election has been marred by violence and claims of poll-rigging.