RIYADH, July 12, 2008 (AFP) - Saudi border guards have seized almost a tonne of explosives and large quantities of arms and drugs on Yemen's border over the past three months, making hundreds of arrests, Okaz newspaper said on Saturday.

The paper, quoting the guards, said 13 hand- and rocket-propelled grenades, 99 sticks of dynamite, 100 fuses, 12 detonators, more than 100 guns and 15,000 cartridges figured in the seizures.

Okaz praised security guards for their vigilance which had prevented the weapons and drugs from falling into the hands of 'terrorists and other elements seeking to destabilise' the Saudi kingdom.

As many as 800 suspected arms and drugs dealers were arrested over the same period, along with 83 illegal immigrants, the report said.

Some 1,600 kilograms (2,640 pounds) of hashish, two million amphetamine pills and 280 bottles of alcohol, which is banned in the ultra-conservative Muslim country, were also seized.