Portuguese officials say a bus carrying Dutch tourists has crashed in southern Portugal, killing three of the tourists and injuring 30 others and the Portuguese bus driver.

Emergency team leader Vitor Vaz Pinto said the bus went off a highway Wednesday night and rolled over into a gully.

Vaz Pinto said the bus was carrying 33 Dutch tourists who had arrived at Faro airport in Portugal's Algarve region, one of Europe's most popular vacation destinations.

He told reporters that authorities had spoken to the driver but he declined to speculate on the possible cause of the crash, which is under investigation.

Vaz Pinto said 156 rescue workers, 101 emergency vehicles and two helicopters attended the scene.