At least 30 people remain missing in Haiti two days after a truck carrying more than twice that number was swept into a river swollen by Tropical Storm Fay, authorities said Tuesday.

Only two bodies have been recovered from the scene of Sunday's accident on the river Glace in southwestern Haiti, said Silvera Guillaume, coordinator of civil protection services in the region.

"We were at the site and found two bodies: a boy of five and a man aged 43. Twenty eight survivors have been identified and the rest of the passengers remain missing," Guillaume said.

Survivors said between 70 and 75 people were riding in the truck when it was swept into the swollen river, he added.

Haitian police, member of the UN peacekeeping mission in Haiti, and personnel from the Haitian Red Cross and the group Medecins du Monde (Doctors of the World) were to continue searching the area, he said.

Fay, the sixth named storm of this year's Atlantic hurricane season, killed at least seven others in Haiti, the poorest nation in the Americas.

The storm was lashing Florida with severe winds and drenching rains Tuesday but never strengthened into the hurricane residents had feared.