BEIRUT (Reuters) - An explosion killed a local official in Lebanon's northern Bekaa Valley region on Wednesday, the National News Agency (NNA) said.

The attack took place in the morning in the town of al-Ain, some 20 km (13 miles) west of the Lebanese-Syrian border, and killed the town's deputy mayor, NNA reported.

A security source, who described it as an assassination, said a bomb exploded inside the local official's van, killing him and severely injuring his brother.

(Reporting by Ellen Francis; editing by Christian Schmollinger and Jason Neely)