BEIRUT, Lebanon (CNN -- A blast targeting a bus carrying Lebanese soldiers went off near an entrance to the northern Lebanese city of Tripoli on Monday, killing four soldiers, authorities said.
Another 30 were wounded in the attack, a high-ranking member of the country's internal security forces told CNN.
The explosion occurred along the side of the road at the southern entrance to Tripoli, a Lebanese port city about 64 km (40 miles) northeast of Beirut.
Last month, an explosion targeting a bus in a business district in central Tripoli killed at least 12 people and wounded 50. Among the dead were at least nine Lebanese soldiers, authorities said.