RIYADH, June 19 (Xinhua) -- Saudi Arabia announced on Monday it has seized a boat, loaded with weapons, heading towards Saudi oil field of Marjan.

The incident occurred on Friday evening, when two other boats managed to escape during the interception by Saudi naval forces, Saudi Press Agency quoted a Saudi official as saying.

The official confirmed the three small boats, bearing red and white flags, entered the Saudi territorial waters in the Gulf. They headed towards the platform of the oil field.

The official said Saudi Arabia is determined to combat and eradicate terrorism and its sources, as a part of "the country's permanent objective to protect its national security against any external aggression."