Video of the seizure shows the boat had a completely sealed deck and a small, sub-like bridge that stood above the water.

Three Colombian crew members and one Guatemalan man were detained on the boat about 425 kilometers off the coast. (Representational Image | Photo: AFP)

Mexico City: Officials in El Salvador say the country's navy has seized nearly 1.7 metric tons of cocaine from a semi-submergible boat off the country's Pacific coast.

Video of the seizure shows the boat had a completely sealed deck and a small, sub-like bridge that stood above the water.

The prosecutors' office announced Friday the drugs were probably worth USD 42 million on the street.

Three Colombian crew members and one Guatemalan man were detained on the boat about 425 kilometers off the coast.

Such boats are designed to keep a low visual and radar profile to escape detection. It was the first such craft seized by El Salvadoran forces.